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研究在加热和冷却过程中的氢致Ti-6Al-4V合金组织转变和相转变。试样从室温加热到1273 K,随后又冷却至室温。氢含量范围为0~0.8%(质量分数)。系统研究氢致Ti-6Al-4V合金动态相变过程及相应的机制。当氢含量增大时,β相转变温度显著降低,但幅度趋缓,并且β相体积分数逐渐增加。在加热过程中,置氢Ti-6Al-4V合金的相转变可以分为三个阶段,具体的过程是:δ→α+H2↑?δ+α′→βH?α′→αH+βH?αH→α+H2↑?α→β?βH→β+H2↑。另外,也对氢含量与α′马氏体的Ms和Mf的关系进行研究。
The transformation and phase transformation of hydrogen-induced Ti-6Al-4V alloy during heating and cooling were investigated. The sample was heated from room temperature to 1273 K and then cooled to room temperature. The hydrogen content ranges from 0 to 0.8% (mass fraction). The dynamic phase transition process and corresponding mechanism of Ti-6Al-4V alloy induced by hydrogen were studied systematically. When the hydrogen content increases, the β phase transition temperature decreases significantly, but the amplitude slows down, and the β phase volume fraction increases gradually. In the heating process, the phase transition of hydrogen-deposited Ti-6Al-4V alloy can be divided into three stages, the specific process is: δ → α + H2 ↑? Δ + α ’→ βH α’ → αH + βH ααH → α + H2 ↑? Α → β? ΒH → β + H2 ↑. In addition, the relationship between the hydrogen content and Ms and Mf of α ’martensite was also investigated.