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Grain refinement process of pure iron target under hypervelocity impact NI Chuan-hao, XU Qiang, WANG Fu-chi School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China Received 19 May 2010; accepted 9 September 2010 Abstract: The structure of ultrafine grain is formed at the crater bottom of pure iron target under hypervelocity impact......
and melting-casting method. The microstructure of master alloy and its grain-refining effect on AZ31 alloy were investigated by means of OM, XRD, SEM and EDS. Experimental results indicated that the prepared master alloy consisted of α-Al, TiAl3, TiC and Al3Y phases, and exhibited good grain-refining performance of AZ31 alloy. Morphology of α-Mg changed from coarse dendritic to fine equiaxed......
for primary a-Mg grains. With 1.0 wt% master alloy addition, the grain size is reduced from 204 to 70 lm. The grain refining efficiency of the Al4C3 particles on the AZ31 alloy is calculated to be 0.04...Effect of Al4C3 Particle Size Distribution in a Al–2.5C Master Alloy on the Refining Efficiency of the AZ31 AlloyYu-Zhen Zhao,Xiao-Teng Liu,Hai HaoKey Laboratory of Solidification Control and Digital......
亚共晶Al-Si合金细化及变质的研究现状与发展 陈延红1,严密1 (1.浙江大学材料科学与工程系,浙江 杭州 310027) 摘要:本文介绍了亚共晶Al-Si常用的细化剂和变质剂,分析和概括了现有的一些细化理论,如"包晶反应","颗粒理论","晶体增殖理论","超形核理论",及变质理论,并简要讨论了化学细化法制备半固态亚共晶Al-Si合金. 关键词:亚共晶Al-Si合金; 细化剂; 变质剂; 细化理论; 半固态; Hypoeutectic Al-Si Alloys; Grain Refiner Modifier; Refining Mechanism; Semi-Solid; [全文内容正在添加中] ......
Effects of Boron Addition on Grain Refinement in TiAl-based AlloysW.D. Wang,Y.C. Ma,B. Chen,M. Gao,K. Liu and Y.Y. Li Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China摘 要...) B alloys were investigated by heat treatment to clarify γ/α2 lamellar microstructure refinement induced by B addition. Experimental results confirmed two kinds of boron-reduced grain refinement......
at -196 °C, which promoted the cleavage fracture in the steels with large-sized grains. Refining the grain size could improve the strength of the high-Mn austenitic steels without impairing...Grain Size-Dependent Mechanical Properties of a High-Manganese Austenitic SteelXiao-Jiang Wang1,2,Xin-Jun Sun2,Cheng Song1,Huan Chen2,Shuai Tong2,Wei Han2,Feng Pan11. School of Materials Science......
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(wt%) grain refiner on the refining performance and modification of A356 alloy was investigated using optical microscope(OM).The morphology and crystal structure of ternary Al-Ti-Sr phases... the grain refining efficiency of A356 alloy.The ternary Al-Ti-Sr phases co-exist in two morphologies,i.e.,blocky-like phase and surround-like phase,besides,which both have the same chemical composition......
Trans. Nonferrous Met. Soc. China 29(2019) 1375-1382 Effect of refining processes on inclusions and mechanical properties of cast Al-2Li-2Cu-0.2Zr alloy Mian RONG1, Liang ZHANG1, Guo-hua WU1, Wei-wei... Abstract: The effect of different refining processes on inclusions and mechanical properties of cast Al-2Li-2Cu-0.2Zr alloy was investigated, including two-stage hexachloroethane (C2Cl6) refining......
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