Failure of cadmium plated maraging steel tension bolt

被引：21

作者：

Reddy, KG ^{[1
]}

Jha, AK ^{[1
]}

Diwakar, V ^{[1
]}

机构：

[1] Vikram Sarabhai Space Ctr, Indian Space Res Org, Mat & Met Grp, Mat Characterizat Div, Trivandrum 695022, Kerala, India

来源：

ENGINEERING FAILURE ANALYSIS | 2001年 / 8卷 / 03期

关键词：

electrodeposition; embrittlement; hydrogen embrittlement; threaded fasteners;

D O I：

10.1016/S1350-6307(00)00011-X

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Cadmium electroplated (EP) high strength steel fasteners are widely used for assembling threaded joints as cadmium gives lubrication and provides excellent corrosion resistance. However, in-house-failure case histories revealed that in some cases delayed failure of cadmium EP high strength steel fasteners occurred. Recently, one such premature failure of a cadmium EP 18 Ni 1800 MPa maraging steel tension bolt occurred at a sustained stress of about 40% of the ultimate tensile stress (UTS), after 11,500 h. For their successful functional application, cadmium EP fasteners require proper and adequate baking treatment after electroplating. This paper highlights details of analysis carried out on the failed bolt to find out the reason for the failure, using standard metallographic and NDT techniques. Remedial measures to minimise, if not totally prevent, such failure are also discussed. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：263 / 269

页数：7

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