Failure Analysis of AISI 440C Steel Ball Screws Used in the Actuator System of a Satellite Launch Vehicle

被引：13

作者：

Manwatkar S.K. ^{[1
]}

Bahrudheen A. ^{[1
]}

Tiwari S.B. ^{[1
]}

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

Ramesh Narayanan P. ^{[1
]}

机构：

[1] Vikram Sarabhai Space Centre, Trivandrum

来源：

Journal of Failure Analysis and Prevention | 2017年 / 17卷 / 3期

关键词：

Aerospace fasteners; Brittle fracture; Characterization; Cracking behavior;

D O I：

10.1007/s11668-017-0268-5

中图分类号：

学科分类号：

摘要：

In view of its excellent wear and corrosion resistance, AISI 440C steel is the material of choice for the fabrication of ball screws used in actuator systems of satellite launch vehicles. During the routine acceptance test of a ball screw, longitudinal cracks were observed at the shaft location of the ball screw. The optical microstructure of the ball screw material (AISI 440C) revealed the presence of aligned carbides (carbide banding). Fractographic observations revealed the cracking to be along the carbide bands. Based on detailed optical and scanning electron microscopic observations, the cracking of the ball screws was attributed to the carbide bands. © 2017, ASM International.

引用

页码：505 / 512

页数：7

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