氢辅助气体捕捉法制备泡沫Ti-6Al-4V及其机理研究

发布时间：2018-05-20 18:11

  本文选题：泡沫Ti-Al-V + 氢　； 参考：《材料工程》2015年11期

【摘要】：对气体捕捉法制备泡沫Ti-6Al-4V过程中未发泡的坯料进行置氢处理,然后再进行等温发泡。运用阿基米德原理对发泡后坯料孔隙率进行测量。通过OM和SEM对坯料内部微观特征进行观察。研究氢对坯料等温发泡过程的影响规律及作用机制。结果表明:质量分数为0.15%的氢能将坯料最佳发泡温度降低60℃,即在890℃下孔隙率可达到32.88%(体积分数),孔径达到160μm,孔洞分布弥散的泡沫Ti-6Al-4V。主要机理:氢以降低坯料(α+β)/β相转变温度的方式,提高基体内塑性较好的β相比例,并能在一定程度上软化α相,降低坯料高温流变应力,进而降低最佳发泡温度。
[Abstract]:The blank which was not foamed in the process of preparing foam Ti-6Al-4V by gas capture method was treated with hydrogen, and then isothermal foaming was carried out. The porosity of foamed billet was measured by Archimedes principle. The internal microscopic characteristics of the billet were observed by OM and SEM. The effect of hydrogen on the isothermal foaming process of billets was studied. The results show that the optimum foaming temperature of the billet can be reduced by 60 鈩，

本文编号：1915702