Fatigue characteristics of high strength C70S6 and SMA40 steels

被引：8

作者：

Kim, Hye Sung ^{[2
]}

Kim, Tae Gyu ^{[1
]}

Chung, Tai-Joo ^{[3
]}

Kim, Hyun Soo ^{[4
]}

Hong, Soon-Jik ^{[5
]}

机构：

[1] Pusan Natl Univ, Dept Nano Syst & Proc Engn, Miryang Si 627706, Kyongnam, South Korea

[2] Pusan Natl Univ, Coll Nanosci & Nanotechnol, Dept Nanomat Engn, Miryang Si 627706, Kyongnam, South Korea

[3] Andong Natl Univ, Sch Adv Mat Engn, Andong, Kyungbu, South Korea

[4] Sam Ho Precis Co, Pusan 618807, South Korea

[5] Kongju Natl Univ, Div Adv Mat Engn, Cheonan 330717, Chungnam, South Korea

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2010年 / 527卷 / 12期

关键词：

High strength steels; Fretting fatigue; Automotive connecting rods; TI-6AL-4V;

D O I：

10.1016/j.msea.2010.01.039

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this study, fatigue characteristics of C70S6 and SMA40 materials as a potential application in connecting rod for an Internal Combustion (IC) engine were investigated. An average fatigue life of 140,200 and 168,700 cycles and a fatigue limit of 432 and 437 MPa were determined for C70S6 and SMA40 specimens, respectively. However, when tested under the fretting condition, the fatigue lifetime was decreased by 77.8% and 20% and the fatigue limit was reduced to 96 and 350 MPa for C70S6 and SMA40 specimens, respectively. From the observations of fracture surfaces, it was confirmed that the fretting played a critical role in introducing many cracks at the initial stage of fatigue. It is clearly shown in this study that special attention should be given to the fatigue behavior of given materials under fretting condition to ensure reliable design and application of components in an automobile. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：2813 / 2818

页数：6

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