DYNAMIC MATERIAL PROPERTIES OF THE HEAT-AFFECTED ZONE (HAZ) IN RESISTANCE SPOT WELDING

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 381
  • Download : 2
This paper is concerned with a methodology to identify the dynamic material properties of the heataffected zone (HAZ) near the base metal in a resistance spot weld process at various strain rates. In order to obtain the dynamic material properties of the HAZ in the spot-welded steel sheet, specimens are prepared to have similar material properties, hardness and microstructure to the actual HAZ. Such thermally simulated specimens are fabricated with the material thermal cycle simulator (MTCS) and compared with the real one for the hardness and microstructure. Dynamic tensile tests are then conducted with a high speed material testing machine. Stress–strain curves of the thermally simulated HAZ are obtained at various strain rates ranged from 0.001/sec to 100/sec. Obtained material properties are applied to the finite element analysis of the spot-welded tensile-shear specimen in order to verify validity of the proposed testing methodology and obtained results. Analysis results demonstrate that the material properties obtained are appropriate for the FE analysis of spot-welded specimens.
Publisher
World Scientific Publishing Company
Issue Date
2008-06
Keywords

resistance spot weld; material thermal cycle simulator; thermally simulated HAZ; dynamic material properties

Citation

Modern Physics Letter B

URI
http://hdl.handle.net/10203/22760
Appears in Collection
ME-Conference Papers(학술회의논문)

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0