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

Yan Chen; Yunping Li; Shingo Kurosu; Kenta Yamanaka; Ning Tang; Yuichiro Koizumi; Akihiko Chiba

doi:10.1016/j.wear.2013.12.010

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

Yan Chen, Yunping Li, Shingo Kurosu, Kenta Yamanaka, Ning Tang, Yuichiro Koizumi, Akihiko Chiba

金属材料研究所・材料プロセス・評価研究部

研究成果: Article › 査読

65 被引用数 (Scopus)

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This study aims to elucidate the synergy effects of the σ 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 σ-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; σ-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.

本文言語	English
ページ（範囲）	51-62
ページ数	12
ジャーナル	WEAR
巻	310
号	1-2
DOI	https://doi.org/10.1016/j.wear.2013.12.010
出版ステータス	Published - 2014 2月 15

ASJC Scopus subject areas

凝縮系物理学
材料力学
表面および界面
表面、皮膜および薄膜
材料化学

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

abstract = "This study aims to elucidate the synergy effects of the σ 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 σ-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; σ-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.",

keywords = "Carbide, CoCrMo alloy, Contact mechanics, Surface fatigue, Wear behavior, σ phase",

author = "Yan Chen and Yunping Li and Shingo Kurosu and Kenta Yamanaka and Ning Tang and Yuichiro Koizumi and Akihiko Chiba",

note = "Funding Information: The authors gratefully acknowledge the financial support of the Ministry of Education, Culture, Sports, Science and Technology of Japan , as part of the Regional Innovation Cluster Program 2010. The authors also acknowledge I. Narida, Y. Kodama and S. Ito for assistance with the EPMA, FIB and TEM assistance, respectively.",

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doi = "10.1016/j.wear.2013.12.010",

language = "English",

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T1 - Effects of sigma phase and carbide on the wear behavior of CoCrMo alloys in Hanks' solution

AU - Chen, Yan

AU - Li, Yunping

AU - Kurosu, Shingo

AU - Yamanaka, Kenta

AU - Tang, Ning

AU - Koizumi, Yuichiro

AU - Chiba, Akihiko

N1 - Funding Information: The authors gratefully acknowledge the financial support of the Ministry of Education, Culture, Sports, Science and Technology of Japan , as part of the Regional Innovation Cluster Program 2010. The authors also acknowledge I. Narida, Y. Kodama and S. Ito for assistance with the EPMA, FIB and TEM assistance, respectively.

PY - 2014/2/15

Y1 - 2014/2/15

N2 - This study aims to elucidate the synergy effects of the σ 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 σ-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; σ-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.

AB - This study aims to elucidate the synergy effects of the σ 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 σ-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; σ-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.

KW - Carbide

KW - CoCrMo alloy

KW - Contact mechanics

KW - Surface fatigue

KW - Wear behavior

KW - σ phase

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DO - 10.1016/j.wear.2013.12.010

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JO - Wear

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

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