本文選題：泡沫Ti-Al-V + 氫��； 參考：《材料工程》2015年11期

【摘要】：對(duì)氣體捕捉法制備泡沫Ti-6Al-4V過(guò)程中未發(fā)泡的坯料進(jìn)行置氫處理,然后再進(jìn)行等溫發(fā)泡。運(yùn)用阿基米德原理對(duì)發(fā)泡后坯料孔隙率進(jìn)行測(cè)量。通過(guò)OM和SEM對(duì)坯料內(nèi)部微觀特征進(jìn)行觀察。研究氫對(duì)坯料等溫發(fā)泡過(guò)程的影響規(guī)律及作用機(jī)制。結(jié)果表明:質(zhì)量分?jǐn)?shù)為0.15%的氫能將坯料最佳發(fā)泡溫度降低60℃,即在890℃下孔隙率可達(dá)到32.88%(體積分?jǐn)?shù)),孔徑達(dá)到160μm,孔洞分布彌散的泡沫Ti-6Al-4V。主要機(jī)理:氫以降低坯料(α+β)/β相轉(zhuǎn)變溫度的方式,提高基體內(nèi)塑性較好的β相比例,并能在一定程度上軟化α相,降低坯料高溫流變應(yīng)力,進(jìn)而降低最佳發(fā)泡溫度。
[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，

本文編號(hào)：1915702