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to the larger residual strain and higher density of the precipitated phase. Key words: iron-based alloy powder; mechanical alloying; microstructure; elongated particles; equiaxed grain; residual... and the fine grains(Fig.8(b)). The precipitated phases in the elongated particles are more than those in the equiaxed grains. 3.4 Vickers microhardness Vickers microhardness of the annealed alloys......
microscopy (SEM) with energy dispersive X-ray spectrometry, and electron probe micro-analysis (EPMA). The results showed that the grains of aluminum alloy were significantly refined and secondary phases... refinement; microstructure; secondary phases Cite this article as: ZOU Hao, PAN Qing-lin, SHI Yun-jia, CHEN Jing, XIANG Hao, LI Rui-shi, LI Hang. Effect of ultrasonic field on microstructure......
treatment and aging were investigated. It is found that the residual β matrix, which was strengthened by fine secondary α platelets forming during aging, exists in all the samples; while primary equiaxed α phase, bent lamellar α phase and α plates are simultaneously or individually present in one sample. The strength of alloy increases proportionally with increasing the content of residual β matrix......
to be in asymmetric distribution. The residual tensile stress mainly exists in the weld at the 304 STS side. The copper filler metal decreases the peak temperature and temperature grade in the joint as well as the residual stress. The longitudinal and lateral residual tensile strengths reduce by 66 MPa and 31 MPa, respectively. From the temperature and residual stress, it is concluded that copper......
Microstructures of spinodal phases in Cu-15Ni-8Sn alloyYanhui Wang, Mingpu Wang, and Bin Hong School of Material Science and Engineering, Central South University, Changsha 410083, China摘 要:<正>The microstructures of spinodal phases in Cu-15Ni-8Sn alloy were studied by TEM. It was found that when the alloy is completely in a as-quenched state......
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and is inapplicable to the material composed of complicated phases [17]. The residual stress measured by the hole-drilling method may be affected by the equipment operators. Other than that, it is difficult...Trans. Nonferrous Met. Soc. China 27(2017) 2043-2054 Residual stress distribution in different depths of TiNi/Ti2Ni-based laser clad coating prepared at different environmental temperatures Yang-feng......
characteristics mainly include displacement rate, effective overburden pressure, start-up pressure gradient of two phases, and reservoir properties. There is a prime displacement rate in ultra-low permeability... reservoir; displacement characteristics; oil displacement efficiency; micro-pore structure; start-up pressure gradient of two phases 深层高压低渗透砂岩油藏属于低渗透油藏范畴,但又有别于常规低渗透油藏.该类油藏储层埋藏深,高温,高压,开发中注水压力高,地层压力下降幅度大,见水后......
收稿日期:1998-10-14 基金:国家八五科技攻关项目! 85- 10 5- 0 3- 0 1- 0 1; Phases of residue in distillation of BiCl3-HCl-H2O system Abstract: The residue phase... at lower temperature of distillation, BiCl 3 and BiCl 3 existed at higher temperature. The reason that distinctive phases of residue formed was also discussed. Keyword:
Analysis of Intermetallic Phases Formed on Surface Vapor Oxidized H13 Hot Work Steels in Molten Aluminum WANG Rong1,WU Xiao-chun1,MIN Yong-an1 (1.School of Materials Science and Engineering... phases formed on the H13 samples surface with optical microscope and X-ray diffraction method. The observation of immersion test sample''s cross-section shows that Fe3O4 film will protect die......
