Age-hardening characteristics of (AuCu)1−Pt pseudobinary alloys
| Autor: | Yasuhiro Tanaka, A. M. El Araby, K. Udoh, Kunihiro Hisatsune, Katsuhiro Yasuda |
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| Rok vydání: | 1996 |
| Předmět: |
Materials science
Mechanical Engineering chemistry.chemical_element Condensed Matter Physics Microstructure Indentation hardness Crystallography Precipitation hardening chemistry Electron diffraction Mechanics of Materials Transmission electron microscopy Hardening (metallurgy) General Materials Science Platinum Crystal twinning |
| Zdroj: | Materials Science and Engineering: A. 206:290-301 |
| ISSN: | 0921-5093 |
| DOI: | 10.1016/0921-5093(95)10019-9 |
| Popis: | To characterize the effects of platinum addition to a stoichiometric AuCu binary alloy on age-hardening mechanisms and related phase transformations, electrical resistivity measurements, hardness tests, X-ray diffraction study, transmission electron microscopy and selected-area electron diffraction examinations were performed on a (AuCu) 1 − x Pt x ( x = 0.0026, 0.0051, 0.0076, 0.0097, 0.0135, 0.0248, 0.0469 and 0.0692) pseudobinary system. Three distinguishable types of hardening behaviour were found depending upon their platinum content, ageing temperatures and periods in the alloys, i.e. (1) the ordering-and-twinning process, (2) the long-period antiphase domain boundary (LPAPB) process, and (3) the two-phase decomposition process. The hardening mechanism and subsequent softening mechanism were explained rationally in relation to the introduction of transformation strain due to AuCu I ordering and relief of strain by twinning, development of the LPAPBs and formation of a chequerboard-like microstructure which was composed of parallelogram-shaped AuCu I ordered regions and cuboidal blocks of a disordered f.c.c. phase. |
| Databáze: | OpenAIRE |
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