Abstract: Some mechanical and thermal properties of FeMnSiCrNi shape
memory alloys are studied. The results show that
Fe-14Mn-6Si-9Cr-5Ni alloy among the alloys studied has the best
SME with an absolute recovery strain of 6.2% when training
method is used. The preexisting ε martensite (thermal and
stressinduced) is beneficial to the shape memory effect. Up to critical prestrain with a critical training time, the absolute
recovery strain increases. Any further increase of prestrain or
training time leads to the appearance of α' phase identified by
superelasticity measurement. Alloys with good SME also have good
creep and stress relaxation resistance, and hence possible
industrial application for couplings.
Key words: FeMnSiCrNi
alloy Mechanical property Shape memory effect Calorimetric
measurement
*
This project
is supported by Ministry of Machinery. Industry of China and Jilin
Provincial Committee of Science and Technology Foundation. Manuscript received on
April 14, 1997; revised manuscript July 7, 1997
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