Improved properties and thermal stability of a titanium-stainless steel solid-state weld with a niobium interlayer  

作　　者：Jianxiong Li Anupam Vivek Glenn Daehn 

机构地区：[1]Department of Materials Science and Engineering,The Ohio State University,2041 College Road,Columbus,OH,43210,USA

出　　处：《Journal of Materials Science & Technology》2021年第20期191-204,共14页材料科学技术（英文版）

基　　金：This work was financially supported by Lightweight Innovations for Tomorrow(LIFT).Project number and title are Joining-R2-1-60061248 and Development of Technologies for Joining Titanium to Steel,respectively;support from National Science Foundation under a Major Research Instrument Grant No.1531785。

摘　　要：Stainless steel(SS)and titanium alloys can be welded in the solid-state by high speed oblique impact.Here,the effect of a niobium(Nb)interlayer on weld strength and thermal stability is evaluated.Both Ti/SS and Ti/Nb/SS welds were subjected to thermal exposure ranging from 300℃ to 950℃ for 1.5 h.Thermal exposure monotonically decreases the strength and toughness of the Ti/SS pair with a dramatic falloff in strength and change in failure mode from partial pullout failure to full interfacial fracture at 600℃.With the interlayer,toughness was increased versus baseline up to 700℃ thermal exposure and then intermetallic formation again caused falloff in properties.Guidelines for the production,properties and applications of these classes of welds are provided.

关 键 词：Impact spot welding Titanium alloy Stainless steel Nb interlayer Thermal exposure Phase transformation 

分 类 号：TG441.7[金属学及工艺—焊接]