Effect of Inclusion Size on Fatigue Properties in Very High Cycle Region of Low Alloy Steel Used for Solid type Crankshaft

Ryota YAKURA; Mariko MATSUDA; Tatsuo SAKAI

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Effect of Inclusion Size on Fatigue Properties in Very High Cycle Region of Low Alloy Steel Used for Solid type Crankshaft

机译：Effect of Inclusion Size on Fatigue Properties in Very High Cycle Region of Low Alloy Steel Used for Solid type Crankshaft

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摘要

A study was conducted to grasp the fatigue properties, including the properties in a very highcycle fatigue region, of a low-alloy steel used for the solid type crankshaft of a 4-cycle diesel engine. Fatigue tests were conducted on specimens, some of which were taken from a solid type crankshaft and others taken from a round forged bar. The relation between the inclusion size at crack initiation sites and the fatigue property was studied on the basis of fracture mechanics. The study developed a relation equation between the fatigue life and inclusion size, as well as a relation equation between the threshold stress intensity range and inclusion size, for fracture initiated from the surface and internal inclusions. These equations show that decreasing inclusion size improves not only the fatigue strength working against surface fracture but also that attributable to internal fracture.

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来源
《Kobelco Technology Review》 |2017年第35期|7-13|共7页
作者
Ryota YAKURA; Mariko MATSUDA; Tatsuo SAKAI;
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作者单位

Technical Development Dept., Steel Casting & Forging Div., Iron & Steel Business;

Dept. of Mechanical Engineering, College of Science and Engineering, RITSUMEIKAN Univ.;

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原文格式 PDF
正文语种英语
中图分类冶金工业;
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Effect of Inclusion Size on Fatigue Properties in Very High Cycle Region of Low Alloy Steel Used for Solid type Crankshaft

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