ZO U Hongcheng DAI Shujuan QIAN Zhixiong LI Guangxia Huazhong University of Science and Technology
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Wuhan
,
China [Originally published in ACTA METALL SIN(CHINESE EDN)25(3)1989 pp A207—A212
,
Associate Professor
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Division of Materials
,
Huazhong University of Science and Technology
,
Wuhan
,
China
金属学报(英文版)
The change of microstructure of fatigue specimens before and after laser radiation was studied by transmission electron microscopy.The results show that the diameter of dislocation cell λ tends to a constant at fatigue failure.Based on the principles of continuous damage mechanics,expressions of the fatigue damage criterion and processes of fatigue damage evolu- tion for L Y12CZ have been derived.
关键词:
laser radiation
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SHI Deke LIU Junhai HAO Hongqi Xi'an Jiaotong University
,
Xi'an
,
China
金属学报(英文版)
It was shown by the study of TEM that the fine lamellar pearlite becomes a ductile phase dur- ing cold drawing.There exist many ledges to emit dislocations at Fe_3C/Fe interface.It is one of the reasons that high density of dislocations emerges at the Fe_3C/Fe interface. Furthermore,there are some evidences to support that dislocation cuts through Fe_3C.There- fore,it is necessary to consider the contribution of cementite being sheared strengthening.
关键词:
cold-drawn steel wire
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null
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