Journal
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING
Volume 15, Issue 7, Pages 590-596Publisher
MANEY PUBLISHING
DOI: 10.1179/136217110X12813393169615
Keywords
Friction welding; Brass; Low carbon steel; Post-weld heat treatment; Joint properties; Crack
Funding
- Ministry of Education, Culture Sports, Science and Technology [20760496]
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This paper describes the effect of post-weld heat treatment (PWHT) on joint properties of copper-zinc alloy (brass) and low carbon steel friction welded joints. The as-welded joint obtained 100% joint efficiency and the brass base metal fracture without cracking at the weld interface, and had no intermetallic compound layer. The joint efficiency with PWHT decreased with increasing heating temperature and its holding time, and its scatter increased with those increasing parameters. When the joint was heat treated at 823 K for 360 ks, it did not achieve 100% joint efficiency and fractured between the weld interface and the brass base metal although it had no intermetallic compound. The cracking at the peripheral portion of the weld interface was generated through PWHT. The cracking was due to the dezincification and the embrittlement of the brass side during PWHT.
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