典型文献
In-process failure analysis of thin-wall structures made by laser powder bed fusion additive manufacturing
文献摘要：
Fabrication of thin-wall components using the laser powder bed fusion(LPBF)additive manufacturing(AM)technology was investigated for two"hard-to-weld"high gamma prime Ni-based superalloys RENé 65(R65)and RENé 108(R108).Simple block parts with wall thicknesses of 0.25 mm,1.00 mm,and 5.00 mm are printed using a bidirectional laser scanning strategy without layer-wise rotation.Parts with walls thinner than 5 mm fail before reaching the designated build height.Results indicate that reduction of limiting build height(LBH)corresponds to the reduction of part thickness and is unaffected by alloy composition.On the contrary,the number of internal micro-cracks along columnar grain boundaries in the build direction(BD)increases with part thickness and is significantly higher in R108 than R65.These findings suggest that reduced LBH in parts with thinner walls is not caused by internal micro-crack for-mation.Fractography and finite element analysis(FEA)of the in-process thermal stresses show that the LBH trend is not explained by the conventional cracking mechanism.Simulations suggest that part thick-ness affects stress distribution leading to more substantial distortion and consequent failure to add layers for continued fabrication of thinner parts.
文献关键词：
中图分类号：
作者姓名：
Apratim Chakraborty;Reza Tangestani;Rasim Batmaz;Waqas Muhammad;Philippe Plamondon;Andrew Wessman;Lang Yuan;Etienne Martin
作者机构：
University of Waterloo,200 University Avenue West,Waterloo,ON N2L 3G1,Canada;Polytechnique Montréal,2500 Chemin de Polytechnique,Montréal,QC H3T 1J4,Canada;University of Arizona,1235 E.James E.Rogers Way,Tucson,AZ 85721-0012,United States;University of South Carolina,301 Main Street,Columbia,SC 29208,United States
文献出处：
引用格式：
[1]Apratim Chakraborty;Reza Tangestani;Rasim Batmaz;Waqas Muhammad;Philippe Plamondon;Andrew Wessman;Lang Yuan;Etienne Martin-.In-process failure analysis of thin-wall structures made by laser powder bed fusion additive manufacturing)[J].材料科学技术（英文版）,2022(03):233-243
A类：
R65,R108,LBH,Fractography
B类：
In,process,failure,analysis,structures,made,by,laser,powder,bed,fusion,additive,manufacturing,Fabrication,components,using,LPBF,AM,technology,was,investigated,two,hard,weld,gamma,prime,superalloys,REN,Simple,block,parts,thicknesses,are,printed,bidirectional,scanning,strategy,without,wise,rotation,Parts,walls,thinner,than,before,reaching,designated,build,height,Results,indicate,that,reduction,limiting,corresponds,unaffected,composition,On,contrary,number,internal,micro,cracks,along,columnar,grain,boundaries,BD,increases,significantly,higher,These,findings,suggest,reduced,not,caused,mation,finite,element,FEA,thermal,stresses,show,trend,explained,conventional,cracking,mechanism,Simulations,affects,distribution,leading,more,substantial,distortion,consequent,layers,continued,fabrication
AB值：
0.536983
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