| Autor: |
K.M. Lin, C.Y. Chung, Hsin-Chih Lin, W.H. Ho, P.C. Wang, T.P. Wang |
| Rok vydání: |
2008 |
| Předmět: |
|
| Zdroj: |
Journal of Alloys and Compounds. 466:119-125 |
| ISSN: |
0925-8388 |
| DOI: |
10.1016/j.jallcom.2007.11.068 |
| Popis: |
The relaxation phenomena arising from both the static-constrained stress and the cyclic variation of atmospheric temperature of Fe59Mn30Si6Cr5 shape memory alloy were studied. Experimental results show that the amount of relaxation decreases with increasing initial compressive loading. The cyclic variation of atmospheric temperature has a smaller effect on the relaxation than the static-constrained stress does. The relaxation phenomenon is more obvious both in the earlier cycles and at higher cyclic heating temperatures. The static-constrained stress relaxation is ascribed to the combination and rearrangement of the stress-induced thin platelets of ɛ martensite. The contribution of cyclic heating on the stress relaxation originates from the formation of new-oriented ɛ martensite. The ɛ ↔ γ transformation, thermal stress and shape-recovery stress during the thermal cycling are considered to have significant influences on the formation of new-oriented ɛ martensite. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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