NEUTRON-DIFFRACTION MEASUREMENTS OF RESIDUAL STRAINS IN OFFSHORE WELDS

被引：19

作者：

LORENTZEN, T ^{[1
]}

IBSO, JB ^{[1
]}

机构：

[1] TECH UNIV DENMARK,DEPT STRUCT ENGN,DK-2800 LYNGBY,DENMARK

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1995年 / 197卷 / 02期

关键词：

RESIDUAL STRAINS; NEUTRON DIFFRACTION; OFFSHORE WELDS; FATIGUE;

D O I：

10.1016/0921-5093(94)09752-6

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Residual stresses in an offshore weld may affect the fatigue life of the structure, and should hence be included in calculations of fatigue crack propagation and fatigue lives. In the present investigation neutron diffraction is used as a non-destructive technique for the evaluation of through thickness variations of residual strains in welded test samples of steel plates. The neutron diffraction strain measurements show relatively high residual strains reaching + 1 x 10(-3) near the outer surfaces and - 4 x 10(-4) near the centre of the plates. A simplified strain/stress conversion indicates that the highest residual stress exceeds approximately 50% of the material yield stress of sigma(y) approximate to 400 MPa.

引用

页码：209 / 214

页数：6