期刊
MATERIALS & DESIGN
卷 31, 期 10, 页码 4800-4807出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2010.05.003
关键词
Welding; Mechanical; Microstructure
资金
- University of Tehran [810713/6/17]
Friction stir welding parameters were adjusted in order to achieve defect-free dissimilar lap joint of CP-Ti to 304 stainless steel. Titanium as a softer material was selected to be on the lap top side. The joint stir zone was found to be consisted of two main regions; the dominant fine dynamically re-crystallized titanium grains at the upper region and a minor composite-type microstructure of fragments of 304 stainless steel in a matrix of fine dynamically re-crystallized titanium grains in the lower region. The stir zone was separated from the 304 stainless steel side by an interface layer of TiFe-based crystal structure. Joint shear strength was measured; a maximum failure load of similar to 73% of that of CP-Ti was achieved. This was associated with the occurrence of fracture at the joint intermetallic-based interface. The failure load value of the fabricated joints is related to the thickness of the intermetallic interface. (C) 2010 Elsevier Ltd. All rights reserved.
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