置氢处理对Ti40合金显微组织及相变的影响  

Effect of Hydrogenation on Microstructure and Phase Transformation of Ti40 Alloy

作　　者：张学敏[1] 赵永庆[2] 曾卫东[3] 陈永楠[1] 张凤英[1] 田晓东[1] 

机构地区：[1]长安大学,陕西西安710064 [2]西北有色金属研究院,陕西西安710016 [3]西北工业大学,陕西西安710072

出　　处：《稀有金属材料与工程》2012年第12期2219-2222,共4页Rare Metal Materials and Engineering

基　　金：中央高校基本科研业务费专项基金(CHD2011JC017)

摘　　要：利用XRD、OM和TEM研究了β型阻燃合金Ti40置氢处理后的显微组织变化及相变过程。结果表明:随着氢含量的增加,Ti40合金中的基体β相逐渐减少,而晶体结构相同但元素组成不同的类β相逐渐增加。当氢含量达到0.3%(质量分数,下同)以上时,晶界处析出细小的η相粒子。η相为面心立方结构,晶格常数a=0.4377nm,成分可表示为:Ti:V:Cr=38.10:35.16:26.66。Ti40合金的氢化过程及相变可表示为:低氢时(≤0.2%):β→βH;高氢时(>0.3%)Microstructure evolution and phase transformation of β phase Ti40 alloy before and after hydrogenation were investigated by XRD, OM, SEM, EDX and TEM. The results show that the amount of matrix β phase decreases while the modified β with the same bcc structure but different elemental composition increases gradually as the hydrogen content increases; the small particles of η phase appear around the grain boundaries when the hydrogen content reaches above 0.3%. The structure of η phase is fcc and the lattice constant is 0.4377 nm. The composition of η phase is Ti： V： Cr = 38.10： 35.16： 26.66. The hydrogenation and phase transformation of Ti40 alloy can be concluded as β→β H for low hydrogen content （≤0.2wt%） and β→β H ＋modified β＋η for high hydrogen content （0.3wt%）.

关 键 词：TI40合金 置氢处理 类β相 Η相 

分 类 号：TG146.23[一般工业技术—材料科学与工程]