Analysis of Microstructure and Micro Mechanical Properties for Weld Joints of 1000MPa Class Steel by Nanoindentation Technique

被引：1

作者：

Peng, Xingna ^{[1
]}

Peng, Yun ^{[1
]}

Wei, Jinshan ^{[1
]}

Tian, Zhiling ^{[1
]}

机构：

[1] Cent Iron & Steel Res Inst, State Key Lab Adv Steel Proc & Prod, Beijing 100081, Peoples R China

来源：

ADVANCED MATERIALS AND PROCESS TECHNOLOGY, PTS 1-3 | 2012年 / 217-219卷

关键词：

HSLA steel; nanoindentation; hardness; weld; microstructure; CONTINUOUS STIFFNESS MEASUREMENT; INSTRUMENTED INDENTATION; ELASTIC-MODULUS; HARDNESS; BEHAVIOR;

D O I：

10.4028/www.scientific.net/AMM.217-219.1987

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanoindentation technique was employed to examine the nanohardness and elastic modulus of weld joints of 1000MPa Class high strength low alloy (HSLA) steel. The distribution of micro scales mechanical behavior was analyzed combined with microstructure observation by OM, SEM and TEM. It was shown that weld metal and base metal were mainly of bainite and their nanohardness is about 4.0GPa. In the heat affected zone, fine grained heat affected zone and coarse grained heat affected zone with lath martensite structure had the maximum hardness (above 4.75GPa). From inter critical region, the hardness of HAZ decreased to 2.5 GPa. However, the elastic modulus of metallic material is not much sensitive to the microstructure.

引用

页码：1987 / 1993

页数：7