Abstract

The structure and mechanical properties of the titanium alloy VT6 joint diffusion welded in vacuum at 820°C using an ultrafine-grained interlayer made of alloy VT22 in are studied after annealing at 900°C for 2 h. The heating-induced activation of diffusion processes is found to halve the number of micropores in the weld zone and to increase the tensile strength of the welded joint from 975 to 1108 MPa. The impact toughness of this joint after heat treatment corresponds to the initial impact toughness of the VT6 alloy.

中文翻译：

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热处理对具有超细晶粒 VT22 合金夹层的固相 VT6 合金焊接接头组织和力学性能的影响

摘要

研究了采用合金VT22制成的超细晶中间层在820℃真空中扩散焊接的钛合金VT6接头在900℃退火2 h后的组织和力学性能。发现加热诱导的扩散过程激活使焊接区的微孔数量减半，并将焊接接头的抗拉强度从 975 MPa 提高到 1108 MPa。该接头在热处理后的冲击韧性对应于 VT6 合金的初始冲击韧性。