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Effect of strain-induced epsilon and alpha '-martensitic transformation on cavitation erosion resistance in austenitic Fe-Cr-C-MnFe-Cr-C-Mnti alloys

Title
Effect of strain-induced epsilon and alpha '-martensitic transformation on cavitation erosion resistance in austenitic Fe-Cr-C-MnFe-Cr-C-Mnti alloys
Author
김선진
Keywords
Cavitation erosion; Steel; Martensitic transformation; Mapping
Issue Date
2015-09
Publisher
ELSEVIER SCIENCE SA
Citation
WEAR, v. 338, Page. 379-384
Abstract
Effect of strain-induced epsilon and alpha'-martensitic transformation #SIMT# on cavitation erosion resistance was investigated in austenitic Fe-Cr-C-Mn alloys as a function of Mn concentration^ Stacking fault energy #SFE# of Fe-16Cr-0^4C-xMn #x=5, 10, and 15# alloys decreased with increasing Mn concentration. As the SFE decreased with increasing Mn concentration, the volume fraction of transformed alpha'-martensite decreased whereas the fraction of epsilon-martensite increased such that the SIMI' type changed from gamma -˃ alpha' to gamma -˃ epsilon + alpha'. It was shown that the cavitation erosion resistance of the gamma -˃ epsilon + alpha' type alloy was superior compared to the gamma -˃ alpha' type alloy. The improvement in cavitation erosion resistance was ascribed to the presence of the epsilon-martensite, hindering the propagation of the grain boundary damage into the grains. #C# 2015 Elsevier B.V. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S0043164815002070http://hdl.handle.net/20.500.11754/27494
ISSN
0043-1648; 1873-2577
DOI
10.1016/j.wear.2015.04.009
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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