Effects of sigma phase and carbide on the wear behavior of CoCrMo alloys in Hanks' solution

被引：71

作者：

Chen, Yan ^{[1
]}

Li, Yunping ^{[2
]}

Kurosu, Shingo ^{[2
]}

Yamanaka, Kenta ^{[1
]}

Tang, Ning ^{[2
]}

Koizumi, Yuichiro ^{[2
]}

Chiba, Akihiko ^{[2
]}

机构：

[1] Tohoku Univ, Dept Mat Sci & Engn, Sendai, Miyagi 9808579, Japan

[2] Inst Mat Res, Sendai, Miyagi 9808577, Japan

来源：

WEAR | 2014年 / 310卷 / 1-2期

关键词：

CoCrMo alloy; sigma phase; Carbide; Wear behavior; Contact mechanics; Surface fatigue; CR-MO ALLOYS; MECHANICAL-PROPERTIES; DEFORMATION-BEHAVIOR; METAL; CARBON; CAST; MICROSTRUCTURE; TRANSFORMATION; WROUGHT; RESISTANCE;

D O I：

10.1016/j.wear.2013.12.010

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This study aims to elucidate the synergy effects of the sigma phase and carbide on the wear behavior of low-carbon (LC) and high-carbon (HC) cobalt-chromium-molybdenum (CoCrMo) alloys, by using pin-on-disc tests under Hanks' lubricated conditions. Fractured or torn-off sigma-phase precipitates were observed to be the main reason for abrasion for both LC and HC alloys. Carbides were torn off at the initial high contact pressure to form pitting; sigma-phase precipitates around the pitting were uprooted and led to micro cracks, which is considered as surface fatigue of HC alloy. In contrast, strain-induced martensite observed on the worn surface was contributed to the increase of hardness and abrasion resistance of LC alloy. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.

引用

页码：51 / 62

页数：12

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