Mechanical Properties, Thermal Stability and Microstructures of W-Re-ZrC Alloys Fabricated by Spark Plasma Sintering

doi:10.3390/met10020277

	Mechanical Properties, Thermal Stability and Microstructures of W-Re-ZrC Alloys Fabricated by Spark Plasma Sintering
	Miao, Shu 1; Xie, Zhuoming 2; Lin, Yan 1; Fang, Qianfeng 2; Tan, Jinhong 1; Zhao, Yunqiang 1
刊名	METALS
	2020-02-01
卷号	10
关键词	tungstenmaterial mechanical alloying solid solution strengthening dispersion strengthening
DOI	10.3390/met10020277
通讯作者	Miao, Shu(miaosh@gwi.gd.cn) ; Zhao, Yunqiang(zhaoyq@gwi.gd.cn)
英文摘要	Tungsten materials, used as friction stir welding tools, undergo severe plastic deformation and even collapse at high operating temperatures. In order to improve the low-temperature toughness and high-temperature strength, W-10wt.%Re-0.5wt.%ZrC alloys were processed by high-energy ball milling and subsequent spark plasma sintering. Single solid-solutionW-Re powders with typical body-centered cubic structures were achieved when the milling time increases to 50 h. The microhardness, tensile properties, thermal stability and microstructures of this sintered W-10wt.%Re-0.5wt.%ZrC alloys were investigated. Synergetic effects of the solute Re and nanosized dispersion particles induce improvements in low-temperature toughness and high-temperature strength. The alloy suffers ductile fracture at 300 degrees C, which is about 400 degrees C and 300 degrees C lower than that of the spark plasma sintered pure W and W-0.5wt.%ZrC, respectively. Besides, this W-10wt.%Re-0.5wt.%ZrC has a high ultimate tensile strength of 818 MPa and uniform elongation of similar to 8.1% at 300 degrees C. Moreover, the microstructures and hardness remain stable even after 1500 degrees C anneal. Based on a detailed microstructure analysis, the mechanisms for the enhanced strength, low-temperature ductility and high thermal stability are proposed and discussed. Grain boundary mobility is impeded by the kinetics constraint through dispersed particles pinning and solute Re atoms dragging, which leads to improved thermal stability. The formation of Zr-C-O particles is most probably attributed to ZrC particles capturing and interacting with impurity oxygen during sintering.
资助项目	GDAS' Special Fund Projects of the Construction of the Domestic First-Class Research Organization[2019GDASYL-0103076] ; GDAS' Special Fund Projects of the Construction of the Domestic First-Class Research Organization[2016GDASRC-0203] ; Key Areas Research and Development Program of Guangdong Province[2019B090921003] ; Science and Technology Plan Project of Guangzhou City[201704030038] ; Science and Technology Plan Project of Guangzhou City[201807010068]
WOS关键词	TUNGSTEN ALLOYS ; BEHAVIOR ; RHENIUM
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	MDPI
WOS记录号	WOS:000522450800122
资助机构	GDAS' Special Fund Projects of the Construction of the Domestic First-Class Research Organization ; Key Areas Research and Development Program of Guangdong Province ; Science and Technology Plan Project of Guangzhou City
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/103523]
专题	中国科学院合肥物质科学研究院
通讯作者	Miao, Shu; Zhao, Yunqiang
作者单位	1.Guangdong Welding Inst, Guangdong Prov Key Lab Adv Welding Technol, China Ukraine EO Paton Inst Welding, Guangzhou 510650, Peoples R China 2.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Miao, Shu,Xie, Zhuoming,Lin, Yan,et al. Mechanical Properties, Thermal Stability and Microstructures of W-Re-ZrC Alloys Fabricated by Spark Plasma Sintering[J]. METALS,2020,10.
APA	Miao, Shu,Xie, Zhuoming,Lin, Yan,Fang, Qianfeng,Tan, Jinhong,&Zhao, Yunqiang.(2020).Mechanical Properties, Thermal Stability and Microstructures of W-Re-ZrC Alloys Fabricated by Spark Plasma Sintering.METALS,10.
MLA	Miao, Shu,et al."Mechanical Properties, Thermal Stability and Microstructures of W-Re-ZrC Alloys Fabricated by Spark Plasma Sintering".METALS 10(2020).