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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:

[1] 拉赫什塔德A Γ.弹簧钢与合金[M].王传恩,栗振域,译.北京:机械工业出版社,1992.
[2]何开元.精密合金材料学[M].北京:冶金工业出版社,1991.
[3]郑晓辉,郭生武, 韩海波,等.冷拔Co40NiCrMo合金的显微组织和抗拉伸性能[J].稀有金属材料与工程,2005,34(8):1302-1305. ZHENG Xiao-hui,GUO Sheng-wu,HAN Hai-bo,et al.Microstructure and tensile properties of cobalt-base elastic alloy after hard-drawn[J].Rare Metal Materials and Engineering,2005,34(8):1302-1305.
[4]Ishmaku A,Han K.Characterization of cold-rolled and aged MP35N alloys[J].Materials Characterization.2001,47(2):139-148.
[5]Asgari S,El-danaf E,Shaji E,et al.The second hardening phenomenon in strain-hardened MP35N alloy[J].Acta Mater,1998,46(3):5795-5806.
[6]Ebrahim M S,Surya R K,Roqer D D.Influence of cold-work and aging heat treatment on the strength and ductility of MP35N[J].Materials Science and Engineering A,1999,272(2):371-379.
[7]Ebrahim M S,Surya R K,Roqer D D,et al.Fracture properties of multiphase alloy MP35N[J].Materials Science and Engineering A,2003,349(1/2):313-317.
[8]Han G W,Jones I P,Smallman R E.Direct evidence for Suzuki segregation and Cottrell pinning in MP159 superalloy obtained by FEG(S)TEM/EDX[J].Acta Mater,2003,51(10):2731-2742.
[9] Shioianq L U,Shang B Z,Luo Z,et al.Investigation on the cold deformation strengthening mechanism in MP159 alloy[J].Metallurgical and Materials Transactions.2000,31(1):5-13.
[10]Lu S Q,Huang B Y,He Y H,et al.Hardening mechanism of MP159 alloy by aging[J].Transactions Nonferrous Metals Society of China,2002,12(2):256-259.
[11]Asqari S.Structure and strain hardening of superalloy AEREX350[J].Journal of Materials Processing Technology,2001,118(1/3):246-250.

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Last Update: 2011-10-20