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Influence of Deformation Rate on Overload Performance and Microstructure of Spot Welded Metastable Austenitic Stainless Steel

Published online by Cambridge University Press:  22 September 2011

Wei Liu ,
Chuanjing Sun ,
Junlei Han ,
Qiang Li  and
Zhikun Song
Wei Liu
Affiliation:
School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
Chuanjing Sun
Affiliation:
School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
Junlei Han
Affiliation:
School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
Qiang Li
Affiliation:
School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
Zhikun Song
Affiliation:
School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
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Abstract

Tensile-shear overload tests of spot welded cold-rolled 301LN plates deforming with slow and fast rates were carried out. The deformation behaviors of spot welds can be divided into two stages. Loading force with fast deformation rate increased more along with displacement in the first stage, while the force with slow rate increased more in the second stage. 21and 32(v.%) α´-martensite were introduced by failure deformation with fast and slow rates respectively. The hardness under the fracture surfaces was higher than HV400, which was more than two times of their original. The ultimate strengths and fracture energy absorptions of spot welds deforming with slow rate were higher than that with fast rate, especially for spot-welded thicker plates.

Keywords

metaljoiningstrength
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1296: Symposium O – New Methods in Steel Design—Steel Ab Initio , 2011 , mrsf10-1296-o03-04
Copyright
Copyright © Materials Research Society 2011

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References

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