期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2018.12.001
关键词
Composite materials; Microstructure; High-temperature compressive; Constitutive equation
类别
资金
- National Natural Science Foundation of China [U1504514]
- Key Projects of the State Key Research and Development Plan [2017YFB0306000]
- Science & Technology Project of Henan Province [152102410037]
Al2O3-dispersion-strengthened tungsten matrix alloys were fabricated by hydrothermal synthesis and powder metallurgy. The v content was varied from 0 to 1 wt%, and sintering was conducted for 8 h at 2350 degrees C. The addition of Al2O3 was found to significantly affect the grain size and compressive strength of the sintered alloys. The grain size of the sintered samples ranged from approximately 10 to 3 um with increasing Al2O3 content. When the Al2O3 content was increased to 0.25 wt%, the microhardness and compressive strength reached the maximum values of 386 HV and 1628 MPa, respectively. Subsequently, the deformation behavior of the W-0.25 wt% Al2O3 alloy at high temperature was studied. The constitutive equation relating the flow stress and deformation parameters of the W-0.25 wt% Al2O3 alloy was established, and the hot deformation activation energy (Q) of the W-0.25 wt% Al2O3 alloy was found to be 321.79 kJ/mol.
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