Prior to the application of AM components for critical applications,it is necessary to have a better un-derstanding of the effect of different post-fabrication treatments on the microstructure and mechanical properties of such parts.In this study,efforts were made to achieve an in-depth understanding of the ef-fect of post-fabrication Solution Heat Treatment(SHT)and Hot Isostatic Pressing(HIP)on the microstruc-ture and mechanical properties of Hastelloy X parts built by electron beam powder bed fusion(PBF-EB)process.The effects of SHT and HIP on porosity,microstructure,texture and mechanical properties have been investigated and compared with that of as-built PBF-EB Hastelloy X.Post-fabrication HIP treatment led to a significant reduction in the porosity content,whereas no notable difference in porosity was ob-served between SHT and as-built parts.There was no evidence of any recrystallization occurring follow-ing the post-fabrication treatments as elongated columnar grain structures observed within as-built part were found to be maintained even after SHT and HIP process alongside the strong(100)crystallographic texture.Emphasis was laid upon understanding the influence of SHT and HIP on mechanical properties through stress-strain curves and work-hardening behaviour.

Amal Shaji Karapuzha;Darren Fraser;Yuman Zhu;Xinhua Wu;Aijun Huang

Department of Materials Science and Engineering,Monash University,Clayton,Victoria 3800,Australia;Monash Centre for Additive Manufacturing,15-17 Normanby Rd,Notting Hill,VIC 3168,Australia;Manufacturing Unit,CSIRO,Clayton,Victoria 3168,Australia

材料科学技术（英文版）

[1]Amal Shaji Karapuzha;Darren Fraser;Yuman Zhu;Xinhua Wu;Aijun Huang-.Effect of solution heat treatment and hot isostatic pressing on the microstructure and mechanical properties of Hastelloy X manufactured by electron beam powder bed fusion)[J].材料科学技术（英文版）,2022(03):99-117

Isostatic

Effect,solution,heat,hot,isostatic,pressing,microstructure,mechanical,properties,Hastelloy,manufactured,by,electron,beam,powder,bed,fusion,Prior,AM,components,critical,applications,necessary,have,better,different,post,fabrication,treatments,such,parts,In,this,study,efforts,were,made,achieve,depth,understanding,Solution,Heat,Treatment,SHT,Hot,Pressing,HIP,built,PBF,EB,process,effects,porosity,texture,been,investigated,compared,that,Post,led,significant,reduction,content,whereas,notable,difference,was,between,There,evidence,any,recrystallization,occurring,follow,elongated,columnar,grain,structures,observed,within,found,maintained,even,after,alongside,strong,crystallographic,Emphasis,laid,upon,influence,through,stress,strain,curves,work,hardening,behaviour

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