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Effects of strain-rate and pre-fatigue on tensile properties of laser welded joint of high strength steel plates
- Source :
- Journal de Physique IV - Proceedings; August 2006, Vol. 134 Issue: 1 p1175-1181, 7p
- Publication Year :
- 2006
-
Abstract
- The impact tensile properties of laser welded butt joints of two kinds of high strength steel plates with the tensile strength level of 590 MPa and 780 MPa (denoted by HR590 and HR780, respectively), were investigated using split Hopkinson bar tensile testing apparatus. Impact tension tests for the joint specimens pre-fatigued were also carried out to examine the effect of pre-fatigue. There were no significant effects of strain-rate and pre-fatigue on the dynamic and quasi-static tensile strength of laser welded butt joints. However, the decrease in the elongation of HR780 welded joints subjected high cycle pre-fatigue was observed only at a high strain-rate. From the observation of fracture surface, it was found that the decrease in the elongation may be caused by a number of damages due to the combination of high cycle pre-fatigue and high strain-rate.
Details
- Language :
- English
- ISSN :
- 11554339 and 17647177
- Volume :
- 134
- Issue :
- 1
- Database :
- Supplemental Index
- Journal :
- Journal de Physique IV - Proceedings
- Publication Type :
- Periodical
- Accession number :
- ejs53438508
- Full Text :
- https://doi.org/10.1051/jp4:2006134179