Microstructure and Fracture Behavior of Tungsten Heavy Alloys

Sunwoo, A

Lawrence Livermore National Laboratory

关键词: Alloys;    36 Materials Science;    Swaging;    Fractures;    Microstructure;   

DOI  :  10.2172/15004934
RP-ID  :  UCRL-ID-154021
RP-ID  :  W-7405-ENG-48
RP-ID  :  15004934

美国|英语

来源: UNT Digital Library

【 摘 要 】

The 93% W-5.6% Ni-1.4% Fe and 93.1% W-4.7% Ni-2.2% Co alloys (WHA) provided by Army Research Laboratory (ARL), Aberdeen are characterized to determine the effects of matrix alloying and swaging on the microstructure and fracture behavior. The W particles are oblong with respect to the swaging direction. The microstructure of the W-Ni-Fe alloy reveals good cohesive bonding between W particles, but there is W-matrix interface separation and matrix alloy cracking. The microstructure of the W-Ni-Co alloy reveals regions of good cohesive bonding between W particles, but also regions where some wetting has not occurred by the liquid. No evidence was observed of matrix alloy cracking. The fracture characteristic of WHA is dominantly cleavage of W particles.