EFFECT OF SURFACE TEXTURE ON THE INITIATION AND PROPAGATION OF SMALL FATIGUE CRACKS IN A FORGED 6082 ALUMINUM-ALLOY

被引：31

作者：

GUNGOR, S

EDWARDS, L

机构：

[1] Fracture Research Group, Materials Discipline, Faculty of Technology, Milton Keynes

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1993年 / 160卷 / 01期

关键词：

D O I：

10.1016/0921-5093(93)90493-X

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The influence of surface texture on initiation and propagation of small fatigue cracks has been studied in a forged Al-Mg-Si alloy. It has been found that the surface character had little effect on the growth rate although there was about 20% reduction in fatigue life for the as-forged surfaces. Examination of crack initiation mechanisms revealed that the impairment in fatigue life was a result of the presence of coarse particles in the as-forged surfaces rather than surface roughness. These coarse particles, which were inadvertently introduced during the forging process, were 20-80 mum in diameter and considerably shorten the crack initiation period.

引用

页码：17 / 24

页数：8

共 13 条

[1] SHORT CRACK BEHAVIOR IN NODULAR CAST-IRON [J].