The development of a high-performance Ni-superalloy additively manufactured heat pipe

查看全文 作　　者：Sheng [1,2]Li;Khamis [2]Essa;James [3]Carr;States [4]Chiwanga;Andrew [5]Norton;Moataz [6]M.Attallah 机构地区：[1]School of Electromechanical Engineering,Guangdong University of Technology,Guangzhou 510006,People’s Republic of China;[2]School of Engineering,University of Birmingham,Edgbaston,Birmingham B152TT,UK;[3]Henry Moseley X-ray Imaging Facility,Henry Royce Institute for Advanced Materials,Department of Materials,University of Manchester,Manchester M139PL,UK;[4]European Thermodynamics Ltd,8 Priory Business Park,Wistow Road,Kibworth,Leicestershire LE80RX,UK;[5]Rolls-Royce plc,P.O.Box 31,Derby DE248BJ,UK;[6]School of Metallurgy and Materials,University of Birmingham,Edgbaston,Birmingham B152TT,UK 出　　处：《Advances in Manufacturing》索引2022年第10卷第4期,共15页 基　　金：The authors would like to acknowledge Rolls-Royce plc,Aerospace Technology Institute,and Innovate UK for funding this research through the Advanced Repair Technologies(113015)programme;The CT scans were performed in the University of Manchester,which was established through EPSRC Grants EP/F007906/1,EP/I02249X/1 and EP/F028431/1;HMXIF is a part of the Henry Royce Institute for Advanced Materials,established through EPSRC Grants EP/R00661X/1,EP/P025498/1 and EP/P025021/1.'。 摘　　要：Additively manufacturing(AM)has been used to manufacture fine structures with structured/engineered porosity in heat management devices.In this study,laser powder bed fusion(LPBF)was used to manufacture a high-performance Ni-superalloy heat pipe,through tailoring LPBF process parameters to fabricate thin wall and micro-channel.By using novel laser scanning strategies,wick structure heat pipes with maximised surface-area-to-volume ratio,fine features size around 100µm,and controlled porosity were successfully fabricated.Microscopy and X-ray microtomography(micro-CT)were used to investigate the 3D structure of the void space within the pipe.Wick test results showed that most of the heat pipes made by LPBF had better performance than the conventionally manufactured pipes.This study also investigated the influences of the process parameters on the porosity volume fraction and the feature size.The results showed that LPBF process could fabricate thin structure due to the change of melt pool contact angle.The relationship between process parameters and bead size reported in this study could help design and manufacture heat pipe with complex fine structure. 关 键 词：Laser powder bed fusion(LPBF) Heat pipe Melt pool Microtomography(micro-CT)