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Microstructure and mechanical property of Co40NiCrMo- alloy deformed with cold rolling(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2011年05期
Page:
106-110
Research Field:
Publishing date:
2011-10-20

Info

Title:
Microstructure and mechanical property of Co40NiCrMo- alloy deformed with cold rolling
Author(s):
HUANG Ping-yun1;  GUO Sheng-wu2;  WANG Wei2;  LUO Kai-shuang2
1. School of Science, Chang'an University, Xi'an 710064, Shaanxi, China; 2. State Key Laboratory of Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China
Keywords:
Co40NiCrMo alloy;  deformed with cold rolling;  microcosmic constructure;  twins;  tensile property;  strengthening mechanism
PACS:
TG146.16
DOI:
-
Abstract:
The influence of deformation with cold rolling on microstructure and mechanical property of Co40NiCrMo-alloy was studied with metallographic microscope, TEM, SEM and tensile test. The results show that the deformation ways in cold rolled Co40NiCrMo-alloy are mainly sliping of dislocations and twinning. The intersection between deformed twins makes the grain size to be small, and then results in the refining of the microstructure in this alloy effectively. After a slight deformation in cold rolling, the tensile strength and yield strength will be enhanced evidently with the increase of deformation. Accordingly, the elongation percentage will decrease dramatically. After above 30% of deformation, the strength and the elongation percentage will change slightly. The fracture surface analysis indicates that the fraction property is influenced by the deformation with cold rolling markedly, with the increase of deformation, the fraction way will be ductile fraction, and then brittle one. The formation and intersection of twins is the main strengthening mechanism in Co40NiCrMo-alloy. 1 tab, 11 figs, 11 refs.

References:

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Last Update: 2011-10-20