(1. 大連理工大學(xué) 材料科學(xué)與工程學(xué)院，大連 116085；2. 北京航空制造工程研究所，北京 100024)
摘 要: 應(yīng)用壓縮實(shí)驗(yàn)研究置氫TC4鈦合金在不同熱處理?xiàng)l件下的顯微組織及室溫變形性能。利用金相顯微鏡、X射線衍射儀和掃描電鏡等手段分析置氫的微觀組織、相組成和斷口特征。結(jié)果表明：氫作為β穩(wěn)定元素，降低了合金的相變點(diǎn)，促進(jìn)斜方馬氏體
關(guān)鍵字: TC4鈦合金；氫處理；力學(xué)性能
（1. School of Materials Science and Engineering, Dalian University of Technology, Dalian 116085, China;2. Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 100024, China）
Abstract:The microstructures and room temperature mechanical properties of hydrogenated TC4 Ti alloy under different heat treatments were studied. The microstructures, composition of phase and the character of the fracture surface were investigated by optical microscope, X-ray diffraction and scanning electron microscope (SEM). The results show that hydrogen as stable element decreases the phase transformation temperature(Tβ) and promote the generation of orthorhombic martensite . When the alloys are quenched above Tβ and in two phase temperature region, the yield strength(σ0.2) decreases dramatically and both the compressive strength and the limited deformation rate(εlim.) increases due to the combination effect of martensite and hydrogen. The changes for specimens quenched over Tβ exhibit more obviously than in two phase temperature region. The deformation limit of specimen containing 0.44%H increases by 20% while σ0.2 decreases by 30%.
Key words: TC4 titanium alloys; hydrogen treatment; mechanical properties
