Abstract

The mechanical properties and structure of a layered composite material based on a Ti–6Al–4V alloy and fabricated by diffusion welding of plates with different grain structures are studied. The outer plates of the material have a microcrystalline structure, and the intermediate plate (reinforcing element) has a nanocrystalline structure. At a welding temperature of 900°C, grain growth to microcrystalline sizes is found to occur in the intermediate layer. Welding at 700°C does not change the grain size in the reinforcing element, and the grain size of the α phase increases slightly as compared to the initial one. The strength of the composite material formed at 700°C can exceed the strength of the composite material formed at 900°C. The scheme of fracture of the composite material in the solid-phase joint zone during a room-temperature tensile test is studied.

中文翻译：

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低温超塑性条件下制备的Ti-6Al-4V层状合金复合材料的力学性能

摘要

研究了基于Ti-6Al-4V合金的层状复合材料的力学性能和结构，该材料是通过扩散焊接不同晶粒结构的板制成的。材料的外板具有微晶结构，中间板（增强元件）具有纳米晶结构。在900℃的焊接温度下，发现在中间层中发生晶粒生长至微晶尺寸。700℃下的焊接不会改变增强元件中的晶粒尺寸，并且与初始相相比，α相的晶粒尺寸略有增加。在700℃下形成的复合材料的强度可以超过在900℃下形成的复合材料的强度。