Effect of Gas on the Flowability of Metallic Powders
Flowability is not an intrinsic property of powders and depends on handling conditions(i.e.flow conditions,temperature,humidity…).Consequently,different methods(Hall and Carney flow,angle of repose,rheometer,avalanche…)and standards have been developed to adjust the measurement methods to flow conditions.However,current methods are still not adapted to the specific requirements of some fabrication processes(ex.: gravity filling of dies for press and sinter applications,spreadability for powder bed additive manufacturing).In some processes,gas and atmosphere play a critical role while their impact may be minimal when testing powders with standard methods.Thus,the development of new methods is essential to better understand and characterise the impact of gas on powder flow.Such methods will be useful to optimise powder characteristics for specific applications,support the development of simulation tools,and serve as control point in fabrication processes.This paper reviews the effect of gas flow on the flowability of various titanium powders and discusses different approaches to take into consideration the effect of gas on the flowability of powders.
Flowability Permeability Additive manufacturing Die filling Powder handling
Lefebvre L.P.
National Research Council Canada,75 de Mortagne,Boucherville,Quebec,Canada,H1Y 2V9
国际会议
北京
英文
2033-2040
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）