Quick Search:       Advanced Search
赵春玲,李维,王强,王玉健,赵宇,邸士雄,任德春,吉海宾.激光选区熔化成形钛合金内部缺陷及其演化规律研究[J].稀有金属材料与工程(英文),2021,50(8):2841~2849.[Zhao Chunling,Li Wei,Wang Qiang,Wang Yujian,Zhao Yu,Di Shixiong,Ren Dechun and Ji Haibin.Investigation on realationship between defects and paramaters for titanium alloy fabricated by selective laser melting[J].Rare Metal Materials and Engineering,2021,50(8):2841~2849.]
Investigation on realationship between defects and paramaters for titanium alloy fabricated by selective laser melting
Download Pdf  View/Add Comment  Download reader
Received:December 31, 2020  
DOI:
Key words: selective laser melting  defect  laser power  scanning speed  laser energy density
Foundation item:中国航发集团产学研合作项目(HFZL2019CXY019);科技部重点研发计划项目(2016YFC1100502)
Author NameAffiliation
Zhao Chunling,Li Wei,Wang Qiang,Wang Yujian,Zhao Yu,Di Shixiong,Ren Dechun and Ji Haibin  
Hits: 11
Download times: 0
Abstract:
      Selective laser melting (SLM) technology can realize the direct fabrication of products with complex shape, high dimensional accuracy, and excellent mechanical properties. However, improper selection of fabrication parameters of SLM will introduce defects in the products. For the problem of defects, this investigation studied the influence of the two main fabrication parameters, laser power and scanning speed, on the type, size and quantity of internal defects in fabricated titanium alloy, and explored the evolution of defects with fabrication parameters. The results shown that there are mainly irregular shape and regular spherical shape defects in the titanium alloy fabricated by SLM. The area with low laser power (≤130 W) and high scanning speed (≥900 mm/s) is mainly irregular shape defects. Insufficient energy is the main reason for formation this type defect. The area with high laser power (≥190 W), low scanning speed (≤600 mm/s) is mainly regular spherical shape defects. The gasification of alloying elements caused by excessive energy is the main reason for formation this type defect. With the increasing of laser energy density, the SLM fabricated titanium alloy processing map was drawn according to the evolution law of defects. The evolution of defects presents three stages for the area of irregular shape defects gradually decreasing, micro-scale irregular defects to micro-scale regular spherical, and regular spherical defects gradually grow up.