Effect of susceptibility to interfacial fracture on fatigue properties of spot-welded high strength sheet steel

Hilditch, Tim, Speer, John and Matlock, David 2007, Effect of susceptibility to interfacial fracture on fatigue properties of spot-welded high strength sheet steel, Materials and design, vol. 28, no. 10, pp. 2566-2576.


Title Effect of susceptibility to interfacial fracture on fatigue properties of spot-welded high strength sheet steel
Author(s) Hilditch, Tim
Speer, John
Matlock, David
Journal name Materials and design
Volume number 28
Issue number 10
Start page 2566
End page 2576
Publisher Scientific and Technical Press
Place of publication Reigate, England
Publication date 2007
ISSN 0264-1275
1873-4197
0261-3069
Keyword(s) A. ferrous metals and alloys
D. welding
E. fatigue
Summary While advanced high strength steels (AHSS) have numerous advantages for the automotive industry, they can be susceptible to interfacial fracture when spot-welded. In this study, the susceptibility of interfacial fracture to spot-weld microstructure and hardness is examined, as well as the corresponding relationships between fatigue, overload performance, and interfacial fracture for a TRIP (transformation induced plasticity) steel. Simple post-weld heat-treatments were used to alter the weld microstructure. The effect on interfacial fracture of diluting the weld pool by welding the TRIP material to non-TRIP steel was examined, along with the effect of altering the base material microstructure. Results show that weld hardness is not a good indicator of either the susceptibility to interfacial fracture, or the strength of the joint, and that interfacial fracture does not necessarily lead to a decrease in strength compared to conventional weld-failure mechanisms, i.e. button pullout. It was also found that while interfacial fracture does affect low cycle to failure behavior, there was no effect on high cycle fatigue.
Language eng
Field of Research 091207 Metals and Alloy Materials
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2006, Elsevier Ltd
Persistent URL http://hdl.handle.net/10536/DRO/DU:30007630

Document type: Journal Article
Collection: Centre for Material and Fibre Innovation
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