Helmut Clemens

(Former)

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Publications / Theses

  1. 2021
  2. Published

    Local-probe based electrical characterization of a multiphase intermetallic γ-TiAl based alloy

    Kratzer, M., Huszar, M., Tengg, L., Billovits, T., Kaufmann, B., Supancic, P., Clemens, H., Mayer, S. & Teichert, C., 28 May 2021, In: Journal of applied physics. 129, 20, 205107.

    Research output: Contribution to journal › Article › Research › peer-review

  3. Published

    Assessment of grain boundary cohesion of technically pure and boron micro-doped molybdenum via meso-scale three-point-bending experiments

    Jakob, S., Hohenwarter, A., Lorich, A., Knabl, W., Pippan, R., Clemens, H. & Maier-Kiener, V., 24 May 2021, In: Materials and Design. 207.2021, September, 8 p., 109848.

    Research output: Contribution to journal › Article › Research › peer-review

  4. Published

    Designing advanced intermetallic titanium aluminide alloys for additive manufacturing

    Wimler, D., Lindemann, J., Reith, M., Kirchner, A., Allen, M., Vargas, W. G., Franke, M., Klöden, B., Weißgärber, T., Güther, V., Schloffer, M., Clemens, H. & Mayer, S., Apr 2021, In: Intermetallics. 2021, 131, p. 1-10 107109.

    Research output: Contribution to journal › Article › Research › peer-review

  5. Published

    Laser powder bed fusion of an engineering intermetallic TiAl alloy

    Schimbäck, D., Braun, J., Leichtfried, G., Clemens, H. & Mayer, S., Mar 2021, In: Materials and Design. 2021, 201, p. 1-11 109506.

    Research output: Contribution to journal › Article › Research › peer-review

  6. Published

    Thermal Expansion of a Multiphase Intermetallic Ti-Al-Nb-Mo Alloy Studied by High-Energy X-ray Diffraction

    Staron, P., Stark, A., Schell, N., Spörk-Erdely, P. & Clemens, H., 4 Feb 2021, In: Materials. 14.2021, 4, p. 1-13 13 p., 727.

    Research output: Contribution to journal › Article › Research › peer-review

  7. Published

    Controlling the high temperature deformation behavior and thermal stability of ultra-fine-grained W by re alloying (vol JAN, 10.1557/s43578-020-00026-z, 2021): Controlling the high temperature deformation behavior and thermal stability of ultra‑fine‑grained W by re alloying (Journal of Materials Research, (2021), 10.1557/s43578-020-00026-z)

    Kappacher, J., Renk, O., Kiener, D., Clemens, H. & Maier-Kiener, V., Feb 2021, In: Journal of Materials Research. 36, 3, p. 784-784 1 p.

    Research output: Contribution to journal › Article › Research › peer-review

  8. Published

    Controlling the high temperature deformation behavior and thermal stability of ultra-fine-grained W by re alloying

    Kappacher, J., Renk, O., Kiener, D., Clemens, H. & Maier-Kiener, V., 4 Jan 2021, In: Journal of Materials Research. 2021, 12, p. 2408-2419

    Research output: Contribution to journal › Article › Research › peer-review

  9. Published

    Advanced in situ electrochemical nanoindentation testing for understanding hydrogen-materials interactions

    Ebner, A., Clemens, H., Pippan, R. & Maier-Kiener, V., 2021.

    Research output: Contribution to conference › Poster › Research

  10. Published

    An additively manufactured titanium alloy in the focus of metallography

    Fleißner-Rieger, C., Pogrielz, T., Obersteiner, D., Pfeifer, T., Clemens, H. & Mayer, S., 2021, In: Practical metallography = Praktische Metallographie. 58.2021, 1, p. 4-31 28 p.

    Research output: Contribution to journal › Article › Research › peer-review

  11. Published

    An atomistic view on Oxygen, antisites and vacancies in the γ-TiAl phase

    Razumovskiy, V. I., Ecker, W., Wimler, D., Fischer, F.-D., Appel, F., Mayer, S. & Clemens, H., 2021, In: Computational materials science. 2021, 197, p. 1-8

    Research output: Contribution to journal › Article › Research › peer-review

  12. Published

    Effects of tungsten alloying and fluorination on the oxidation behavior of intermetallic titanium aluminides for aerospace applications

    Donchev, A., Mengis, L., Couret, A., Mayer, S., Clemens, H. & Galetz, M., 2021, In: Intermetallics. 2021, 139, p. 1-14

    Research output: Contribution to journal › Article › Research › peer-review

  13. Published

    Geometrical model for calculating the effect of surface morphology on total x-ray output of medical x-ray tubes

    Siller, M., Minkkinen, M., Bogust, P., Jelinek, A., Schatte, J., Bostrom, N., Greenland, K., Knabl, W., Clemens, H., Pippan, R. & Maier-Kiener, V., 2021, In: Medical physics. 2021, 48, p. 1546-1556

    Research output: Contribution to journal › Article › Research › peer-review

  14. Published

    High temperature nanoindentation as a tool to investigate plasticity upon phase transformations demonstrated on Cobalt

    Kappacher, J., Tkadletz, M., Clemens, H. & Maier-Kiener, V., 2021, In: Materialia. 2021, 16, p. 1-9

    Research output: Contribution to journal › Article › Research › peer-review

  15. Published

    How grain boundary characteristics influence plasticity close to and above the critical temperature of ultra-fine grained bcc Ta2.5W

    Kappacher, J., Renk, O., Kiener, D., Clemens, H. & Maier-Kiener, V., 2021, In: Acta materialia. 2021, 216, p. 1-11 117110.

    Research output: Contribution to journal › Article › Research › peer-review

  16. Published

    Influence of Nb on Ti diffusion in γ-TiAl intermetallics studied by mechanical spectroscopy

    Ibanez-Perez, J., No, M. L., Oehring, M., Clemens, H. & San Juan, J. M., 2021, In: Journal of alloys and compounds. 2021, 867, p. 1-8

    Research output: Contribution to journal › Article › Research › peer-review

  17. Published

    In situ investigation of the rapid solidification behavior of intermetallic γ-TiAl-based alloys using high-energy X-ray diffraction

    Graf, G., Rosigkeit, J., Krohmer, E., Staron, P., Krenn, R., Clemens, H. & Spörk-Erdely, P., 2021, In: Advanced Engineering Materials. 2021, p. 1-7

    Research output: Contribution to journal › Article › Research › peer-review

  18. Published

    Microstructure and mechanical properties of novel TiAl alloys tailored via phase and precipitate morphology

    Wimler, D., Lindemann, J., Kremmer, T., Clemens, H. & Mayer, S., 2021, In: Intermetallics. 2021, 138, p. 1-10

    Research output: Contribution to journal › Article › Research › peer-review

  19. Published

    Microstructure evolution induced by the intrinsic heat treatment occurring during wire-arc additive manufacturing of an Al-Mg-Zn-Cu crossover alloy

    Klein, T., Graf, G., Staron, P., Stark, A., Clemens, H. & Spörk-Erdely, P., 2021, In: Materials letters. 2021, 303, p. 1305001-1305004

    Research output: Contribution to journal › Article › Research › peer-review

  20. Published

    Phase constitution in an intermetallic Ti-37Al-10Nb alloy: what we can learn about the phase equilibria

    Rashkova, B., Brabetz, M., Mendez Martin, F., Distl, B., Hauschildt, K., Stein, F. & Clemens, H., 2021.

    Research output: Contribution to conference › Poster › Research

  21. Published

    Stable and metastable phases in Cu20Sn investigated via high resolution methods

    Lumper, L., Kappacher, J., Clemens, H. & Maier-Kiener, V., 2021.

    Research output: Contribution to conference › Poster › Research

  22. 2020
  23. Published

    Selective Laser Melting of a Near-alpha Ti6242S Alloy for High-Performance Automotive Parts

    Fleißner-Rieger, C., Pfeifer, T., Jörg, T., Kremmer, T., Brabetz, M., Clemens, H. & Mayer, S., 17 Dec 2020, In: Advanced Engineering Materials. 2021, p. 1-12 12 p.

    Research output: Contribution to journal › Article › Research › peer-review

  24. Published

    In situ fracture observations of distinct interface types within a fully lamellar intermetallic TiAl alloy

    Burtscher, M., Alfreider, M., Schmuck, K., Clemens, H., Mayer, S. & Kiener, D., 11 Nov 2020, In: Journal of Materials Research. 2021, 12, p. 2465-2478 14 p.

    Research output: Contribution to journal › Editorial › peer-review

  25. Published

    High-temperature phenomena in an advanced intermetallic nano-lamellar γ-TiAl-based alloy. Part I: Internal friction and atomic relaxation processes

    Usategui, L., Klein, T., No, M. L., Mayer, S., Clemens, H. & Juan, J. S., Nov 2020, In: Acta materialia. 200, 200, p. 442-454 13 p.

    Research output: Contribution to journal › Article › Research › peer-review

  26. Published

    An Advanced TiAl Alloy for High-Performance Racing Applications

    Burtscher, M., Klein, T., Lindemann, J., Lehmann, O., Fellmann, H., Güther, V., Clemens, H. & Mayer, S., 22 Oct 2020, In: Materials. 13.2020, 21, p. 1-14 14 p., 4720.

    Research output: Contribution to journal › Article › Research › peer-review

  27. Published

    The Development and Characterization of High-Performance Materials: A Retrospective Article

    Clemens, H., Sept 2020, In: Practical metallography = Praktische Metallographie. 57.2020, 9, p. 614-649 36 p.

    Research output: Contribution to journal › Article › Research › peer-review

  28. Published

    Thermally activated deformation mechanisms and solid solution softening in W-Re alloys investigated via high temperature nanoindentation

    Kappacher, J., Leitner, A., Kiener, D., Clemens, H. & Maier-Kiener, V., 1 Apr 2020, In: Materials and Design. 189.2020, April, 6 p., 108499.

    Research output: Contribution to journal › Article › Research › peer-review

  29. Published

    A Modified Electrochemical Nanoindentation Setup for Probing Hydrogen-Material Interaction Demonstrated on a Nickel-Based Alloy

    Ebner, A. S., Brinckmann, S., Plesiutschnig, E., Clemens, H., Pippan, R. & Maier-Kiener, V., 16 Mar 2020, In: JOM. 72.2020, 5, p. 2020-2029 10 p.

    Research output: Contribution to journal › Article › Research › peer-review

  30. Published

    Exploring structural changes, manufacturing, joining, and repair of intermetallic γ-TiAl-based alloys: Recent progress enabled by in situ synchrotron X-Ray techniques

    Spörk-Erdely, P., Staron, P., Liu, J., Kashaev, N., Stark, A., Hauschildt, K., Maawad, E., Mayer, S. & Clemens, H., 2020, In: Advanced Engineering Materials. 2020, p. 1-32

    Research output: Contribution to journal › Article › Research › peer-review

  31. Published

    Heat treatments and critical quenching rates in additively manufactured Al – Si – Mg alloys

    Hitzler, L., Hafenstein, S., Mendez Martin, F., Clemens, H., Sert, E., Öchsner, A., Merkel, M. & Werner, E., 2020, In: Materials.

    Research output: Contribution to journal › Article › Research › peer-review

  32. Published

    Microstructural and Phase Analysis of an Additively Manufactured Intermetallic TiAl Alloy using Metallographic Techniques and High-Energy X-Rays

    Jop, M., Wartbichler, R., Staron, P., Maawad, E., Mayer, S. & Clemens, H., 2020, In: Practical metallography = Praktische Metallographie. p. 84-95

    Research output: Contribution to journal › Article › Research

  33. Published

    Microstructural evolution of W-10Re alloys due to thermal cycling at high temperatures and its impact on surface degradation

    Siller, M., Schatte, J., Gerzoskovitz, S., Knabl, W., Pippan, R., Clemens, H. & Maier-Kiener, V., 2020, In: International journal of refractory metals & hard materials. 2020, 92, p. 1-11

    Research output: Contribution to journal › Article › Research › peer-review

  34. Published

    Novel intermetallic-reinforced near-α Ti alloys manufactured by spark plasma sintering

    Wimler, D., Lindemann, J., Gammer, C., Spörk-Erdely, P., Stark, A., Clemens, H. & Mayer, S., 2020, In: Materials science and engineering: A, Structural materials: properties, microstructure and processing. 2020, 792, p. 1-11

    Research output: Contribution to journal › Article › Research › peer-review

  35. 2019
  36. Published

    Electron beam melting of a β-solidifying intermetallic titanium aluminide alloy

    Wartbichler, R., Clemens, H. & Mayer, S., 1 Dec 2019, In: Advanced Engineering Materials. 21, 12, 1900800.

    Research output: Contribution to journal › Article › Research › peer-review

  37. Published

    The creep behavior of a fully lamellar γ-TiAl based alloy

    Burtscher, M., Klein, T., Mayer, S., Clemens, H. & Fischer, F. D., 1 Nov 2019, In: Intermetallics. 114, 106611.

    Research output: Contribution to journal › Article › Research › peer-review

  38. Published

    Influence of crystal orientation and Berkovich tip rotation on the mechanical characterization of grain boundaries in molybdenum

    Jakob, S., Leitner, A., Lorich, A., Eidenberger-Schober, M., Knabl, W., Pippan, R., Clemens, H. & Maier-Kiener, V., 2 Jul 2019, In: Materials & design. 182.2019, 15 November, p. 1-9 9 p., 107998.

    Research output: Contribution to journal › Article › Research › peer-review

  39. Published

    Microstructural Evolution and Mechanical Properties of an Advanced γ-TiAl Based Alloy Processed by Spark Plasma Sintering

    Wimler, D., Lindemann, J., Clemens, H. & Mayer, S., 9 May 2019, In: Materials. 12.2019, 9, 12 p., 1523.

    Research output: Contribution to journal › Article › Research › peer-review

  40. Published

    Thermal Expansion and Other Thermodynamic Properties of α2-Ti3Al and γ-TiAl Intermetallic Phases from First Principles Methods

    Holec, D., Abdoshahi, N., Mayer, S. & Clemens, H., 19 Apr 2019, In: Materials. 12.2019, 8, 11 p.

    Research output: Contribution to journal › Article › Research › peer-review

  41. Published

    Kornfeinung ausscheidungsverfestigter Hochtemperaturferrite mittels Ce-haltiger Einschlüsse

    Godor, F. R., Mayerhofer, A., Presoly, P., Clemens, H., Mayer, S. & Bernhard, C., 4 Apr 2019, In: Berg- und hüttenmännische Monatshefte : BHM. 164.2019, 5, p. 220-224 5 p.

    Research output: Contribution to journal › Article › Research › peer-review

  42. Published

    Deformation-induced phase transformation in a Co-Cr-W-Mo alloy studied by high-energy X-ray diffraction during in-situ compression tests

    Weißensteiner, I., Petersmann, M., Erdely, P., Stark, A., Antretter, T., Clemens, H. & Maier-Kiener, V., Feb 2019, In: Acta materialia. 164.2019, February, p. 272-282 11 p.

    Research output: Contribution to journal › Article › Research › peer-review

  43. Published

    In situ and atomic-scale investigations of the early stages of γ precipitate growth in a supersaturated intermetallic Ti-44Al-7Mo (at.%) solid solution

    Erdely, P., Staron, P., Stark, A., Klein, T., Clemens, H. & Mayer, S., Feb 2019, In: Acta materialia. 164.2019, February, p. 110-121 12 p.

    Research output: Contribution to journal › Article › Research › peer-review

  44. Published

    Combination of Nanoindentation and Microscopy for the Examination of Aluminum Alloys in Coarse- and Ultrafine-Grained Condition

    Kappacher, J., Leitner, A., Clemens, H. & Maier-Kiener, V., 9 Jan 2019, In: Practical metallography = Praktische Metallographie. 56.2019, 7, p. 432-442 11 p.

    Research output: Contribution to journal › Article › Research

  45. Published

    Evidence of an orthorhombic transition phase in a Ti-44Al-3Mo (at.%) alloy using in situ synchrotron diffraction and transmission electron microscopy

    Musi, M., Erdely, P., Rashkova, B., Clemens, H., Stark, A., Staron, P., Schell, N. & Mayer, S., Jan 2019, In: Materials characterization. 147.2019, January, p. 398-405 8 p.

    Research output: Contribution to journal › Article › Research › peer-review

  46. Published

    Ausgewählte Methoden der quantitativen Phasenanalyse einer additiv gefertigten TNM-Titanaluminid-Legierung

    Wartbichler, R., Bürstmayr, R., Clemens, H. & Mayer, S., 2019, In: Practical metallography = Praktische Metallographie. 56.2019, 4, p. 220-229 10 p.

    Research output: Contribution to journal › Article › Research › peer-review

  47. Published

    Beryllium – A challenge for preparation and mechanical characterization

    Siller, M., Kappacher, J., Rolli, R., Clemens, H. & Maier-Kiener, V., 2019, In: Practical metallography = Praktische Metallographie. p. 624-33

    Research output: Contribution to journal › Article › Research

  48. Published

    Exploring the mechanical character of molybdenum grain boundaries via nanoindentation and three-point-bending

    Jakob, S., Leitner, A., Hohenwarter, A., Lorich, A., Knabl, W., Clemens, H., Pippan, R. & Maier-Kiener, V., 2019.

    Research output: Contribution to conference › Poster › Research

  49. Published

    Formation of an orthorhombic transition phase in a Ti-Al-3Mo alloy: in situ synchrotron diffraction and TEM studies

    Rashkova, B., Musi, M., Erdely, P., Stark, A., Staron, P., Schell, N., Clemens, H. & Mayer, S., 2019.

    Research output: Contribution to conference › Poster › Research

  50. Published

    High-Resolution characterization of intermetallic TiAI-Powder for additive Manufacturing

    Wimler, D., Gammer, C., Eckert, J., Mendez Martin, F., Lindemann, J., Clemens, H. & Mayer, S., 2019, Euro PM2019 - Powders for AM - Powder Production. p. 1-5

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  51. Published

    Materialographie intermetallischer Titanaluminide - die (additive) Fertigung macht den Unterschied

    Mayer, S., Schimbäck, D., Wartbichler, R., Wimler, D. & Clemens, H., 2019, Praktische Metallographie Sonderband 53. p. 21-30

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  52. Published

    Metallography of Intermetallic Titanium Aluminides – the ( Additive ) Manufacturing Makes the Difference

    Mayer, S., Schimbäck, D., Wartbichler, R., Wimler, D. & Clemens, H., 2019, In: Practical metallography = Praktische Metallographie. p. 567-584

    Research output: Contribution to journal › Article › Research

  53. Published

    Microstructural characterization of molybdenum grain boundaries by micropillar compression testing and atom probe tomography

    Jakob, S., Lorich, A., Eidenberger-Schober, M., Knabl, W., Clemens, H. & Maier-Kiener, V., 2019, In: Practical metallography = Praktische Metallographie. 2019, 56, p. 776-786

    Research output: Contribution to journal › Article › Research › peer-review

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