Structure Evolving at Bonding Interface of Dual-Alloys Jointed with Different Method under Coupling Action of Heat and Force

Abstract:

During near isothermal forging and heat treatment structure change of bonding interface in Ti3Al/TC11 and Ti2AlNb/TC11 dual alloys jointed with different method has been investigated. The results show that the solidification structure at dual-alloy joint welded by electron beam in vacuum has evolved into forging structure, columnar grains have been changed into equiaxed grains through breaking, crystal lattatice rebuild and re-crystallizing, and the mechanical bonding plus metallurgical bonding structure at joint welded by linear friction weld has transformed into metallurgy structure altogether, because constant high temperature during near isothermal forging can cause the diffusion of alloy elements and reconstruction of lattice structure.

• Periodical: Advanced Materials Research (Volume 668)
• Pages: 543-546
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.668.543
• Online since: March 2013
• Authors: Ze Kun Yao, Chun Qin, Yong Quan Ning, Jing Xia Chao, Jian Wei Zhang, Zhong Gang Tan, Zhang Long Zhao
• Keywords: Bonding Interface, Dual-Alloy, Near Isothermal Forging, Structure

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