基于气体捕捉法的泡沫Ti-6Al-4V等温发泡规律研究

发布时间：2018-03-18 05:35

  本文选题：泡沫钛　切入点：等温发泡　出处：《材料科学与工艺》2015年04期 　论文类型：期刊论文

【摘要】：为了确定气体捕捉法制备泡沫Ti-6Al-4V等温发泡过程中孔隙率和微观孔洞的变化规律,在不同发泡温度及发泡时间下制备了泡沫Ti-6Al-4V.运用阿基米德原理对泡沫Ti-6Al-4V的孔隙率进行测量,通过OM和SEM对其微观特征进行观察.研究表明:泡沫Ti-6Al-4V的孔隙率及孔径均随等温发泡温度升高而增加;但当发泡温度大于950℃时,孔隙率和孔径均减小,且孔洞形态由球形变成多边形,这是由于基体内生成大尺寸β相造成的.增加发泡时间能以促进孔洞长大的方式提高泡沫Ti-6Al-4V的孔隙率,球形孔洞数量随着发泡时间的增加逐渐增多.经950℃/10 h发泡得到了孔隙率34.2%、孔径平均值156μm、孔洞为球形且分布弥散的泡沫Ti-6Al-4V.
[Abstract]:In order to determine the variation of porosity and microvoid in the isothermal foaming process of Ti-6Al-4V foam prepared by gas capture method, Ti-6Al-4V foam was prepared at different foaming temperatures and foaming time. The porosity of foam Ti-6Al-4V was measured by Archimedes principle. The microcosmic characteristics of foam Ti-6Al-4V were observed by OM and SEM. The results showed that the porosity and pore size of foam Ti-6Al-4V increased with the increase of isothermal foaming temperature, but when the foaming temperature was higher than 950 鈩，

本文编号：1628261