Abstract：In this paper，93W-5Ni-2Fe tungsten heavy alloy prepared by powder metallurgy method were tested at
1 000，1 100，1 200，1 300 and 1 400 ℃，the high temperature mechanical properties were investigated respectively.
The fracture analysis and the developing principles of fracture mechanism were studied. The results show when
the elevating temperature is 1 000- 1 400 ℃ ，mechanical properties of 93W- 5Ni- 2Fe alloy，such as tensile
strength，elongation，reduction of area and Young's module get worsedramatically. Material becomes brittle，transgranular
fracturecan be hardly found，binder phase tear and inter-facial fracture between tungsten grain and binder
phases are domestic fracture mode.
2020, Vol. 30 
