论文部分内容阅读
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%):β→βH+modifiedβ+η
XRD, OM and TEM were used to study the microstructure and phase transformation of β-type flame-retardant alloy Ti40 after hydrogen treatment. The results show that with the increase of hydrogen content, the β phase in Ti40 alloy decreases gradually, while the β phase with the same crystal structure but different elemental composition increases gradually. When the hydrogen content reaches 0.3% (mass fraction, the same below) above, the grain boundary precipitates small η phase particles. η phase is face-centered cubic structure, the lattice constant a = 0.4377nm, the composition can be expressed as: Ti: V: Cr = 38.10: 35.16: 26.66. Hydrogenation process and phase transition of Ti40 alloy can be expressed as: β → βH in low hydrogen (> 0.2%): β → βH + modified β + η