Weld defects and evaluation of weld quality: Welding phenomena and process control in flash welding of steel sheets (1st report)
- 1 January 1996
- journal article
- other
- Published by Taylor & Francis in Welding International
- Vol. 10 (2) , 117-123
- https://doi.org/10.1080/09507119609548961
Abstract
This paper describes an investigation of the effects of the chemical composition of the base material on the quality of flash welds. Bending tests of welds were run for 43 types of steel sheets, including solution‐strengthened, precipitation‐strengthened, and complex structure‐strengthened (dual‐phase) high‐strength steels up to 590 MPa. A fractographic analysis showed cracks at the weld interface to be caused by oxide inclusions. Aluminium, silicon, and manganese are the major constituents of the inclusions, and the relative intensity of effect of these elements broadly has an Al:Si:Mn = 10:1:0.01 sequence. Carbon is also shown to affect interface cracking by reducing weld ductility. An equivalent formula is experimentally established to determine the effects of these elements on interface cracking. The ordinary bending test is shown to be a simple and reliable method for quantitative evaluation of the interface quality of flash welds, with the notch bending test being more effective for evaluation purposes.Keywords
This publication has 1 reference indexed in Scilit:
- Study on the Flash Welding Phenomena of Steels (2nd Report)JOURNAL OF THE JAPAN WELDING SOCIETY, 1971