Dynamic Recrystallization Behavior of Biomedical CCM Alloy with Additions of C and N

被引：10

作者：

Yamashita, Yui ^{[2
]}

Li, Yunping ^{[1
]}

Onodera, Emi ^{[1
]}

Matsumoto, Hiroaki ^{[1
]}

Chiba, Akihiko ^{[1
]}

机构：

[1] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

[2] Tohoku Univ, Dept Mat Sci, Sch Engn, Sendai, Miyagi 9808577, Japan

来源：

MATERIALS TRANSACTIONS | 2010年 / 51卷 / 09期

关键词：

biomedical materials; cobalt chromium molybdenum alloy; dynamic recrystallization; electron backscattering diffraction (EBSD); compression test; hot forging process; MECHANICAL-PROPERTIES; DEFORMATION; MICROSTRUCTURE;

D O I：

10.2320/matertrans.MAW201007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In order to examine the dynamic recrystallization (DRX) behaviors of Co-29Cr 6Mo alloy with additions of both C and N (hereafter CCMCN alloy) uniaxial compression tests in the temperature, range of 1273 to 1473 K and strain rates of 0 01 to 30s(-1) were carried out The influence of hot forging conditions (i e , temperature strain rate and strain) on the microstructure of deformed sample was investigated in detail by means of electron backscattering diffraction (EBSD) and optical microscopy (OM) The results revealed that the initial microstructure is a stable gamma face centered cubic (FCC) phase with a large number of M23C6 precipitates both inside the grains and at grain boundaries The DRXed grains were observed to be uniformly distributed and to decrease with strain The high volume fraction of Sigma 3 boundaries after the DRX was observed indicating a close relation between die DRX mechanism and Sigma 3 boundary) formations In addition, the activation energy Q of CCMCN alloy was observed to be higher as compared to those of alloys without C or N addition and that with N addition [doi 10 2320/matertrans MAW201007]

引用

页码：1633 / 1639

页数：7

共 16 条

[1]

Chiba A., 2007, MAT JAPAN, V46, P194

[2]

CHIBA A, 2005, FORUM, V475, P2317

[3] DEFORMATION TWINNING [J].