Densification and microstructure formation mechanisms of 80 W-14Ni-6Fe fabricated by laser powder bed fusion

Ye, Han; Huang, Yibin; Wei, Chao; Liu, Yaliang

doi:10.1016/j.jallcom.2022.164684

Cited by 8 publications

(1 citation statement)

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“…The density of tungsten heavy alloy can reach 19.3 g/cm 3 [ 2 ]. Tungsten alloy is a prominent metal among the refractory metals due to its high melting point, high density, excellent high temperature strength, good thermal conductivity, and low coefficient of thermal expansion [ 3 , 4 , 5 ]. The advantages of these properties make it widely used in aviation, aerospace, and military applications [ 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Hot Isostatic Pressing Process Parameters on Properties and Fracture Behavior of Tungsten Alloy Powders and Sintered Bars

Cai

2022

Materials

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In order to investigate the effect of hot isostatic pressing (HIP) process parameters on the properties and fracture behavior of tungsten alloy, HIP experiments with different process parameters were carried out, and the relative density, Rockwell hardness, tensile properties, and tensile fracture behavior were analyzed. The results show that after HIP, the tungsten alloy samples obtained further densification, higher relative density and hardness, and lower dispersity. At 1300 °C and 140 MPa, the sintered bar achieved excellent mechanical properties: yield strength increased by 16.5%, tensile strength increased by 16.1%, and fracture strength increased by 85.3%. Comparing the two processes, the mechanical properties of tungsten alloy powders formed directly via HIP were not as good as those of the sintered bars. In addition, after HIP, the fracture mode of the tungsten alloy sintered bar samples was mainly ductile tear, and that of the tungsten alloy powder samples was mainly a full brittle fracture.

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