摘要
以混合 Ti、Al、Mo 元素粉末为原料制备新型 Ti-6Al-yMo (3≤y≤11)合金,并研究了合金沉积层的显微组织及硬度。结果发现:随着 Mo 含量的增加,合金沉积层的初生α束域体积分数逐渐减小,同时 Ti-6Al-yMo 合金的组织逐渐由魏氏组织转变为网篮组织形态,初生α相的尺寸和长宽比均随着 Mo 含量的增加而减小,次生α相的体积分数随着 Mo 含量的增加而增大。对激光多层沉积 Ti-6Al-yMo 合金的显微硬度进行了测试,结果发现:在所采用的合金成分范围内,Mo 含量小于 11%时,随着 Mo 含量的增加,激光多层沉积 Ti-6Al-yMo 合金沉积态的硬度几乎呈线性增加。
The novel Ti-6Al-yMo （3≤y≤11） titanium alloys were deposited from blended Ti, Al and Mo powders using the laser solid forming （LSF） process and the microstructure and hardness of as-deposited layers were investigated. Results show that the volume fraction of the prior a colony decreases and the microstructure changes from widmanstaitten structure to basketweave structure with the increase of Mo content. Meanwhile, the average size and aspect ratio of the prior a lath decrease and the volume fraction of the secondary a laths increases with the increase of Mo content. The microhardness of as-deposite layers was also measured, and it is found that the hardness of as-deposited Ti-6Al-yMo alloys increases predominantly linearly with the increase of the Mo content until 11 wt% Mo.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2013年第7期1332-1336,共5页
Rare Metal Materials and Engineering
基金
Fund of the State Key Laboratory of Solidification Processing in NWPU (SKLSP201102)
National Natural Science Foundation of China (51105311)
