SHEAR MODE OF DUCTILE FRACTURE IN MILD-STEEL

被引：4

作者：

FRENCH, IE

WEINRICH, PF

机构：

[1] Materials Research Laboratories, Defence Science and Technology Organisation, Melbourne

来源：

MATERIALS SCIENCE AND ENGINEERING | 1979年 / 39卷 / 01期

关键词：

D O I：

10.1016/0025-5416(79)90168-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The details of the shear mode of ductile fracture in sheet tensile specimens of a pearlitic 0.9% steel have been investigated using the techniques of optical, scanning electron and transmission electron microscopy. During necking of the specimens many small voids were found to form at pearlite colonies within the neck. These voids occured at a number of positions with respect to the pearlite colonies. With further elongation the deformation became concentrated into zones of shear in which the pearlite-initiated voids grew in a shear manner and finally coalesced. These shear zones consisted of material with an elongated cell structure. The fracture surfaces consisted mainly of shallow elongated dimples. The mechanism of this type of fracture in the pearlitic steel was compared with that of the same steel in the spheroidized condition which has been studied previously. © 1979.

引用

页码：43 / 46

页数：4