表面塑性变形对高Nb-TiAl合金扩散连接的影响
Influence of Surface Plastic Deformation on Diffusion Bonding of High Nb Containing TiAl Alloy
采用高能喷丸方法在高Nb-TiAl 合金表面引入塑性变形, 研究其对高Nb-TiAl 合金扩散连接的影响。结果表明: 喷丸处理后待连接表面产生厚度约150 μm的变形影响区。表面变形区在扩散连接过程中未发生显著再结晶, 但是后续热处理后连接界面处发生强烈再结晶, γ相占据了原始平直界面。室温剪切强度的测试结果表明, 表面塑性变形可有效降低高Nb-TiAl合金的扩散连接温度, 连接接头的剪切强度最高达到420 MPa。
Surface plastic deformation was applied onto a high Nb containing TiAl alloy by means of high energy shot peening (HESP), and then the influence of surface plastic deformation on diffusion bonding of the high Nb containing TiAl alloy was investigated. The results show that a deformed region with a depth of about 150 m was produced by HESP. No recrystallization was observed in the deformed region during the bonding process. However, the bonding interface disappeared and large number of recrystallized grains was found near the bonding interface after post bonding heat treatment (PBHT) process. The results of shear test at room temperature reveal that HESP was beneficial to lower the bonding temperature and to ensure a shear strength 420 MPa for the bonding joints.
李金山、寇宏超、齐先胜、王川云、薛祥义、唐斌
金属学、热处理焊接、金属切割、金属粘接材料科学
金属材料高Nb-TiAl合金扩散连接表面塑性变形剪切强度
李金山,寇宏超,齐先胜,王川云,薛祥义,唐斌.表面塑性变形对高Nb-TiAl合金扩散连接的影响[EB/OL].(2023-03-18)[2025-08-03].https://chinaxiv.org/abs/202303.00296.点此复制
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