Process Window for Electron Beam Melting of 316LN Stainless Steel

被引：11
作者：
Roos, Stefan [1 ]
Rannar, Lars-Erik [1 ]
机构：
[1] Mid Sweden Univ, Sports Tech Res Ctr, Dept Qual Management & Mech Engn, Akademigatan 1, SE-83125 Ostersund, Sweden
来源：
METALS | 2021年 / 11卷 / 01期
关键词：
powder bed fusion; electron beam melting (EBM); process window; stainless steel; 316LN;
D O I：
10.3390/met11010137
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Electron beam melting (EBM) is currently hampered by the low number of materials available for processing. This work presents an experimental study of process parameter development related to EBM processing of stainless steel alloy 316LN. Area energy (AE) input and beam deflection rate were varied to produce a wide array of samples in order to determine which combination of process parameters produced dense (>99%) material. Both microstructure and tensile properties were studied. The aim was to determine a process window which results in dense material. The range of AE which produced dense materials was found to be wider for 316LN than for many other reported materials, especially at lower beam deflection rates. Tensile and microstructural analysis showed that increasing the beam deflection rate, and consequently lowering the AE, resulted in material with a smaller grain size, lower ductility, lower yield strength, and a narrower window for producing material that is neither porous nor swelling.
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页码：1 / 11
页数：11
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