期刊
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
卷 50, 期 7-8, 页码 1187-1191出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijsolstr.2012.12.020
关键词
Heterogeneous martensite nucleation; Phase field model; Microscopic defects; Finite element method
类别
资金
- National Natural Science Foundation of China [10902128, 10732100, 50802026, 10972239, 11072271]
The mechanisms for heterogeneous cubic -> tetragonal martensite nucleation due to different types of microscopic defects (voids, stress-concentration site, inertial inclusion and pre-existing nucleus) and the temporal evolution of martensite morphology are monitored with finite element simulation of phase filed model. The results demonstrate that the nucleation prefers to occur around void and stress-concentration site initially; high residual stress exists around inertial inclusion; pre-existing nucleus promotes nearby martensite phase to develop on it. The effects of various defects on heterogeneous nucleation are different, and stress relaxation behavior is the dominant factor which characterizes the whole microstructure evolution process. (C) 2013 Elsevier Ltd. All rights reserved.
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