Phase stability and mechanical properties of wire+arc additively manufactured H13 tool steel at elevated temperatures  

作　　者：A.N.M.Tanvir Md.R.U.A hsan Gijeong Seo Brian Bates Chanho Lee Peter K.Liaw Mark Noakese Andrzej Nycz Changwook Ji Duck Bong Kim 

机构地区：[1]Department of Mechanical Engineering,Tennessee Technological University,Cookeville,TN 38505,USA [2]Department of Manufacturing and Engineering Technology,Tennessee Technological University,Cookeville,TN 38505,USA [3]Center for Manufacturing Research,Tennessee Technological University,Cookeville,TN 38505,USA [4]Department of Materials Science and Engineering,University of Tennessee,Knoxville,TN 37996,USA [5]Manufacturing Demonstration Facility,Oak Ridge National Laboratory,Oak Ridge,TN 37830,USA [6]Advanced Forming Process R&D Group,Korea Institute of Industrial Technology,Ulsan 44413,Republic of Korea

出　　处：《Journal of Materials Science & Technology》2021年第8期80-94,共15页材料科学技术（英文版）

基　　金：support of the Korea Institute of Industrial Technology as a project on the development of metal 3D printing materials and process optimization technology for medium-and large-sized transportation part mold manufacturing(KITECH JE200008)。

摘　　要：Wire+arc additive manufacturing(WAAM)is considered an innovative technology that can change the manufacturing landscape in the near future.WAAM offers the benefits of inexpensive initial system setup and a high deposition rate for fabricating medium-and large-sized parts such as die-casting tools.In this study,AISI H13 tool steel,a popular die-casting tool metal,is manufactured by cold metal transfer(CMT)-based WAAM and is then comprehensively analyzed for its microstructural and mechanical properties.Location-dependent phase combinations are observed,which could be explained by nonequilibrium thermal cycles that resulted from the layer-by-layer stacking mechanism used in WAAM.In addition,remelting and reheating of the layers reduces welding anomalies(e.g.,pores and voids).The metallurgical characteristics of the H13 strongly correlate with the mechanical properties.The combinations of phases at different locations of the additively manufactured part exhibit a periodic microhardness profile.Martensite,Retained Austenite,Ferrite,and Carbide phases are found in combination at different locations of the part based on the part’s temperature distribution during additive deposition.Moreover,the tensile properties at elevated temperatures(23℃,300℃,and 600℃)are comparable to those from other WAAM and additive manufacturing(AM)processes.The X-ray diffraction results verify that the microstructural stability of the fabricated parts at high temperatures would allow them to be used in high temperatures.

关 键 词：Tool steel Martensitic steel Wire+arc additive manufacturing(WAAM) High temperature tensile test High temperature XRD 

分 类 号：TG142.45[一般工业技术—材料科学与工程]