【摘要】 氢处理技术是通过氢的可逆合金化作用,对钛合金的微观组织、力学性能和加工性能进行调整的一种新兴热加工技术。钛合金中氢的加入可以增加钛合金中塑性相的体积分数,降低流动应力,提高超塑性性能,从而降低钛合金的超塑性变形对变形速率和变形温度的苛刻要求。利用氢处理与塑性变形相配合制备晶粒尺寸小于1μm的超细晶,使钛合金在更低的变形温度和更高变形速率下呈现出超塑性,是攻克钛合金扩大应用瓶颈的一条新途径。更多还原

【Abstract】 Hydrogen treatment is a new technique in metal forming which can improve the microstructure of titanium alloys, workability and mechanical properties with the hydrogen reversible alloying. Hydrogen absorption in titanium alloys could increase the proportion of the β-phase, decrease the flow stress and improve the superplasticity of titanium alloys, therefore reduce the requirement of deformation temperature and strain rate for superplastic forming. The ultra-fine grain with less than 1μm obtained through combining severe plastic deformation with hydrogen treatment has good superplasticity at lower deformation temperature and higher strain rate. It is a new effective method for solving the problem for hard to deform of titanium alloys.更多还原