Thermally activated deformation mechanisms and solid solution softening in W-Re alloys investigated via high temperature nanoindentation
Thermally activated deformation mechanisms in three different W-Re alloys were investigated by performing high temperature nanoindentation experiments up to 800 °C. With increasing Re content the athermal hardness increases, while the temperature-dependent thermal contribution is strongly decreased....
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2020-04-01
|
| Series: | Materials & Design |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127520300320 |
| _version_ | 1811214599100301312 |
|---|---|
| author | Johann Kappacher Alexander Leitner Daniel Kiener Helmut Clemens Verena Maier-Kiener |
| author_facet | Johann Kappacher Alexander Leitner Daniel Kiener Helmut Clemens Verena Maier-Kiener |
| author_sort | Johann Kappacher |
| collection | DOAJ |
| description | Thermally activated deformation mechanisms in three different W-Re alloys were investigated by performing high temperature nanoindentation experiments up to 800 °C. With increasing Re content the athermal hardness increases, while the temperature-dependent thermal contribution is strongly decreased. This results in a reduced strain rate sensitivity for W-Re alloys compared to pure W. The origin of this effect is a reduction of the Peierls potential due to Re, manifesting in an increased activation volume at lower temperatures. This gives rise to a solid solution softening effect, while at high-temperature application the mechanical behavior is governed by dislocation-dislocation interaction and solution strengthening. Keywords: Refractory metals, High temperature deformation, Plastic deformation, Strain rate sensitivity |
| first_indexed | 2024-04-12T06:07:18Z |
| format | Article |
| id | doaj.art-7366d9d4ae4840b7bb4d6fd70c41309f |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-04-12T06:07:18Z |
| publishDate | 2020-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-7366d9d4ae4840b7bb4d6fd70c41309f2022-12-22T03:44:49ZengElsevierMaterials & Design0264-12752020-04-01189Thermally activated deformation mechanisms and solid solution softening in W-Re alloys investigated via high temperature nanoindentationJohann Kappacher0Alexander Leitner1Daniel Kiener2Helmut Clemens3Verena Maier-Kiener4Department of Materials Science, Chair of Physical Metallurgy & Metallic Materials, Montanuniversität Leoben, Franz Josef-Str. 18, A-8700 Leoben, AustriaDepartment of Materials Science, Chair of Physical Metallurgy & Metallic Materials, Montanuniversität Leoben, Franz Josef-Str. 18, A-8700 Leoben, AustriaDepartment of Materials Science, Chair of Materials Physics, Montanuniversität Leoben, Franz Josef-Str. 18, A-8700 Leoben, AustriaDepartment of Materials Science, Chair of Physical Metallurgy & Metallic Materials, Montanuniversität Leoben, Franz Josef-Str. 18, A-8700 Leoben, AustriaDepartment of Materials Science, Chair of Physical Metallurgy & Metallic Materials, Montanuniversität Leoben, Franz Josef-Str. 18, A-8700 Leoben, Austria; Corresponding author.Thermally activated deformation mechanisms in three different W-Re alloys were investigated by performing high temperature nanoindentation experiments up to 800 °C. With increasing Re content the athermal hardness increases, while the temperature-dependent thermal contribution is strongly decreased. This results in a reduced strain rate sensitivity for W-Re alloys compared to pure W. The origin of this effect is a reduction of the Peierls potential due to Re, manifesting in an increased activation volume at lower temperatures. This gives rise to a solid solution softening effect, while at high-temperature application the mechanical behavior is governed by dislocation-dislocation interaction and solution strengthening. Keywords: Refractory metals, High temperature deformation, Plastic deformation, Strain rate sensitivityhttp://www.sciencedirect.com/science/article/pii/S0264127520300320 |
| spellingShingle | Johann Kappacher Alexander Leitner Daniel Kiener Helmut Clemens Verena Maier-Kiener Thermally activated deformation mechanisms and solid solution softening in W-Re alloys investigated via high temperature nanoindentation Materials & Design |
| title | Thermally activated deformation mechanisms and solid solution softening in W-Re alloys investigated via high temperature nanoindentation |
| title_full | Thermally activated deformation mechanisms and solid solution softening in W-Re alloys investigated via high temperature nanoindentation |
| title_fullStr | Thermally activated deformation mechanisms and solid solution softening in W-Re alloys investigated via high temperature nanoindentation |
| title_full_unstemmed | Thermally activated deformation mechanisms and solid solution softening in W-Re alloys investigated via high temperature nanoindentation |
| title_short | Thermally activated deformation mechanisms and solid solution softening in W-Re alloys investigated via high temperature nanoindentation |
| title_sort | thermally activated deformation mechanisms and solid solution softening in w re alloys investigated via high temperature nanoindentation |
| url | http://www.sciencedirect.com/science/article/pii/S0264127520300320 |
| work_keys_str_mv | AT johannkappacher thermallyactivateddeformationmechanismsandsolidsolutionsofteninginwrealloysinvestigatedviahightemperaturenanoindentation AT alexanderleitner thermallyactivateddeformationmechanismsandsolidsolutionsofteninginwrealloysinvestigatedviahightemperaturenanoindentation AT danielkiener thermallyactivateddeformationmechanismsandsolidsolutionsofteninginwrealloysinvestigatedviahightemperaturenanoindentation AT helmutclemens thermallyactivateddeformationmechanismsandsolidsolutionsofteninginwrealloysinvestigatedviahightemperaturenanoindentation AT verenamaierkiener thermallyactivateddeformationmechanismsandsolidsolutionsofteninginwrealloysinvestigatedviahightemperaturenanoindentation |