粉末冶金技术2026，Vol.44Issue(1)：32-41,10.DOI:10.19591/j.cnki.cn11-1974/tf.2025010006
表面超声滚压对电子束选区熔化TC4合金微观组织及腐蚀行为的影响
Effects of ultrasonic surface rolling process on microstructure and corrosion behavior of TC4 alloys manufactured by selective electron beam melting
摘要
Abstract
TC4 alloys were manufactured by selective electron beam melting(SEBM)and subjected to ultrasonic surface rolling processing(USRP)in this study.The effects of USRP on the surface and microstructure of the alloys were investigated by optical microscopy,X-ray diffraction(XRD),and electron backscatter diffraction(EBSD).The corrosion behavior was analyzed with electrochemical testing methods.The results indicate that USRP causes the severe plastic deformation on the surface of SEBM-TC4 alloys,leading to the grain refinement,facilitating the formation of a gradient deformation layer(about 30 μm thick),and ultimately enhancing the surface finish and densification.In 3.5％mass fraction NaCl solution,the corrosion potential of the USRP-treated samples(-0.092 VSCE)is significantly higher than that of the sandpaper-ground samples(-0.216 VSCE),and the corrosion current density decreases by approximately 43.5％.Moreover,the passivation films on USRP-treated SEBM-TC4 exhibit a double-layer structure,with TiO2 in the outer layer and(TiO2+Ti2O3)in the inner layer.In summary,USRP improves the surface finish and densification of the metal,introduces the high-density dislocations in deformation layer to refine grains,and promotes the formation of a dense passivation film,notably improving the corrosion resistance of SEBM-TC4 alloys.关键词
钛合金/超声滚压/晶粒细化/变形层/电化学腐蚀Key words
titanium alloys/ultrasonic surface rolling process/grain refinement/deformed layer/electrochemical corrosion分类
矿业与冶金引用本文复制引用
黄浪,张建涛,李星毅,肖志瑜..表面超声滚压对电子束选区熔化TC4合金微观组织及腐蚀行为的影响[J].粉末冶金技术,2026,44(1):32-41,10.基金项目
国家自然科学基金资助项目(52274363) （52274363）
广东省自然科学基金资助项目(2023B1515120100) （2023B1515120100）
