Failure analysis study on a fractured bolt

被引：17

作者：

Valles Gonzalez, P. ^{[1
]}

Pastor Muro, A. ^{[1
]}

Garcia-Martinez, M. ^{[1
]}

机构：

[1] Natl Inst Aerosp Technol INTA, Ctra Torrejon Ajalvir,Km 4, Torrejon, Madrid, Spain

来源：

ENGINEERING FAILURE ANALYSIS | 2020年 / 109卷

关键词：

Fractography; Fatigue crack growth; Hydrogen embrittlement;

D O I：

10.1016/j.engfailanal.2019.104355

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The aim of this work is the determination of the cause of a bolt fracture. The group was formed by a screw and a castellated self-braking nut with a plastic brake. Chemical, mechanical and microstructural material characterizations were carried out, fulfilling all material specifications. A microscopic observation revealed fatigue striations, which are typical signs of a progressive fracture. The fracture has been produced in the penultimate thread, one of the most critical zones of the screw. Hydrogen embrittlement also could have occurred, decreasing the fatigue resistance of the screw, but also its life of service.

引用

页数：6