STUDY ON FATIGUE CRACK GROWTH BEHAVIOR OF 16MnR STEEL UNDER DIFFERENT CONDITIONS

被引：0

作者：

Xiong Ying ^{[1
,2
]}

Chen Bingbing ^{[1
,2
]}

Zheng Sanlong ^{[1
,2
]}

Gao Zengliang ^{[1
,2
]}

机构：

[1] Zhejiang Univ Technol, Coll Mech Engn, Hangzhou 310032, Zhejiang, Peoples R China

[2] Zhejiang Univ Technol, Minist Educ, Key Lab Mech Mfg & Automat, Hangzhou 310032, Zhejiang, Peoples R China

来源：

ACTA METALLURGICA SINICA | 2009年 / 45卷 / 07期

关键词：

16MnR steel; fatigue crack growth rate; high temperature; notch sizes; R-ratio; specimen thickness; SPECIMEN THICKNESS;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

16MnR steel is a most widely used material for pressure vessels. The study on fatigue is very important for safety and fatigue life assessment of pressure vessels. Several experimental researches for fatigue of 16MnR steel were conducted and test data have been gotten, but it was short of fatigue study of the material under various conditions at present. The fatigue crack growth tests of 16MnR hot-rolling steel were carried out at different temperatures and R-ratios with compact tension (CT) specimens in this paper. Different sized circular notches at the tip of the slot ranging from very sharp to blunt were used in the CT specimens and the radii of the notches were 0.1, 1 and 2 mm, and the thicknesses of CT specimens were 3.8, 12.5, 18 and 25 mm, respectively. The fatigue crack growth performances were obtained. The effects of temperatures, notch sizes, R-ratios and specimen thickness on fatigue crack growth behaviors were studied. It was shown that the fatigue crack growth rates at 150 and 300 degrees C were lower than those at 25 and 425 degrees C, the lowest one was at 300 degrees C and the crack growth rate increased with temperature above 300 degrees C. The great influence of notch sizes on the fatigue crack growth rate was observed at early stage of crack growth only. The results also indicated that fatigue crack growth rate increased as the specimen thickness increased, but the fatigue crack growth rate of 16MnR steel was insensitive to the R-ratios.

引用

页码：849 / 855

页数：7

共 13 条

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