激光立体成形和超声冲击混合制造Ti60合金的显微组织和性能  

Microstructure and properties of Ti60 alloy by laser solid forming and ultrasonic impact hybrid manufacturing

作　　者：陈文婧 黄春平 刘丰刚 梁仁瑜 刘奋成 杨海欧[2] Wen-jing CHEN;Chun-ping HUANG;Feng-gang LIU;Ren-yu LIANG;Fen-cheng LIU;Hai-ou YANG(National Defense Key Discipline Laboratory of Light Alloy Processing Science and Technology,Nanchang Hangkong University,Nanchang 330063,China;Key Laboratory of Metal High Performance Additive Manufacturing and Innovative Design,Northwestern Polytechnical University,Xi’an 710072,China)

机构地区：[1]南昌航空大学轻合金加工科学与技术国防重点学科实验室,南昌330063 [2]西北工业大学金属高性能增材制造与创新设计重点实验室,西安710072

出　　处：《Transactions of Nonferrous Metals Society of China》2023年第11期3319-3331,共13页中国有色金属学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.52165050);the Natural Science Foundation of Jiangxi Province,China(No.20181BAB206027).

摘　　要：采用激光立体成形(LSF)和超声冲击处理(UIT)混合制造的方法,通过逐层强化表面,改善Ti60合金的结构和性能。采用SEM、TEM和XRD分析并比较UIT前后LSF处理Ti60样品的显微组织、力学性能和阻燃性能。结果表明,UIT后LSF处理Ti60合金的晶粒得到细化,冶金缺陷减少。同时,UIT后沉积层严重变形,并在表面形成纳米晶体。此外,沉积层表面显微硬度提高,残余应力由拉应力变为压应力。烧蚀坑面积减少了21%,Mo,Nb和Zr元素的比例增加。综上所述,LSF和UIT的混合制造可以改善LSF处理Ti60样品的显微组织和性能。The hybrid manufacturing of laser solid forming(LSF)and ultrasonic impact treatment(UIT)was used to improve the structure and properties of Ti60 alloy by strengthening the surface layer-by-layer.The microstructure,mechanical properties,and burn resistance of LSFed Ti60 samples before and after UIT by SEM,TEM,and XRD were analyzed and compared.The results showed that the grains of LSFed Ti60 alloy were refined and metallurgical defects were reduced after the UIT process.Meanwhile,the deposited layer was severely deformed after UIT and nanocrystals were formed on the surface.In addition,the microhardness of the deposition layer surface increased and the residual stress changed from tensile stress to compressive stress.The area of the ablation hole was reduced by 21%and the proportions of Mo,Nb,and Zr elements increased.In summary,hybrid manufacturing of LSF and UIT can improve the microstructure and properties of LSFed Ti60 samples.

关 键 词：Ti60合金 超声冲击处理 激光立体成形 显微组织 力学性能 阻燃性能 

分 类 号：TG146.23[一般工业技术—材料科学与工程] TG66[金属学及工艺—金属材料]