Effects of graphene oxide on microstructure and mechanical properties of 600℃ high temperature titanium alloy
CHEN Hang1,2,3, MI Guang-bao1,3, LI Pei-jie2, WANG Xu-dong1,3, HUANG Xu1, CAO Chun-xiao1
1. Aviation Key Laboratory of Science and Technology on Advanced Titanium Alloys, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, China;
2. National Center of Novel Materials for International Research, Tsinghua University, Beijing 100084, China;
3. Beijing Engineering Research Center of Graphene and Application, Beijing 100095, China
Abstract：The 600℃ high temperature titanium alloy composite with graphene oxide addition was prepared by temperature-controlled mixing method and hot isostatic pressing. Microstructure and mechanical properties of composite were studied by metallographic observation, energy spectrum analysis, phase analysis and tensile test. The results show that graphene oxides are dispersed uniformly in the 600℃ high temperature titanium alloy powder when the content of graphene oxide is 0.3%(mass fraction) and the main mode of action is physical adsorption. Compared with the alloy without graphene oxide, the microstructure of the composite with 0.3% graphene oxide is obviously refined, and the average size of equiaxed alpha phase is reduced by 36%. Meanwhile, the average room temperature tensile strength and yield strength increase by 7.8% and 10.4% respectively and Vickers hardness increases by 25.6%. The strengthening mechanisms of graphene oxide on 600℃ high temperature titanium alloy mainly include grain refinement strengthening,dislocation streng-thening and precipitation strengthening of the (TiZr)6Si3 second-phase.
陈航, 弭光宝, 李培杰, 王旭东, 黄旭, 曹春晓. 氧化石墨烯对600℃高温钛合金微观组织和力学性能的影响[J]. 材料工程, 2019, 47(9): 38-45.
CHEN Hang, MI Guang-bao, LI Pei-jie, WANG Xu-dong, HUANG Xu, CAO Chun-xiao. Effects of graphene oxide on microstructure and mechanical properties of 600℃ high temperature titanium alloy. Journal of Materials Engineering, 2019, 47(9): 38-45.
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2019, Vol. 47 
