Metallurgical analysis of a failed maraging steel shear screw used in the band separation system of a satellite launch vehicle

被引：11

作者：

Murty, S. V. S. Narayana ^{[1
]}

Manwatkar, Sushant K. ^{[1
]}

Narayanan, P. Ramesh ^{[1
]}

机构：

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

来源：

DEFENCE TECHNOLOGY | 2016年 / 12卷 / 05期

关键词：

M250 grade maraging steel; Shear screw; Separation system; Mermen band; Stress corrosion cracking; FAILURE;

D O I：

10.1016/j.dt.2016.05.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Maraging steels have excellent combination of strength and toughness and are extensively used for a variety of aerospace applications. In one such critical application, this steel was used to fabricate shear screws of a stage separation system in a satellite launch vehicle. During assembly preparations, one of the shear screws which connected the separation band and band end block has failed at the first thread. Microstructural analysis revealed that the crack originated from the root of the thread and propagated in an intergranular mode. The failure is attributed to combined effect of stress and corrosion leading to stress corrosion cracking. (C) 2016 China Ordnance Society. Production and hosting by Elsevier B.V.

引用

页码：380 / 387

页数：8

共 12 条

[1] ENVIRONMENTAL-STRESS INTENSITY FOR MARAGING-STEEL [J].