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an obvious refinement effect on the cast grain of magnesium and its alloys without the alloy element Al because the crystal structure of zirconium is the same as magnesium matrix, and the lattice parameters are close to magnesium. Zirconium can decrease the grain size of magnesium from 150 to 20 μm. The rare earth cerium also has a grain refinement effect on Mg and Mg-Al alloy. The cerium atoms tend......
, growth restriction of the Al4C3 particles agglomerated at growing front is the other mechanism. Key words: AM60B magnesium alloy; grain refinement; MgCO3 1 Introduction Magnesium alloys... commonly-used magnesium alloys, such as AM60, AZ91D and AZ31, their mechanical properties are relatively low and cannot meet the requirement of many applications [1]. It is well known that grain refinement......
Numerical simulation of acoustic pressure field for ultrasonic grain refinement of AZ80 magnesium alloy SHAO Zhi-wen, LE Qi-chi, ZHANG Zhi-qiang, CUI Jian-zhong Key Laboratory of Electromagnetic... is increased and the grain size is decreased generally. Key words: numerical simulation; acoustic pressure; ultrasonic treatment; grain refinement; magnesium alloy 1 Introduction Owing to its......
Trans. Nonferrous Met. Soc. China 26(2016) 1783-1790 Effects of grain refinement and residual elements on hot tearing of A713 aluminium cast alloy Anil Kumar BIRRU1, D. BENNY KARUNAKAR2 1. Department... prevent hot tearing of A713 alloy. Key words: aluminium alloy; hot tearing; pouring temperature; grain refinement 1 Introduction Hot tearing is a severe defect encountered in alloy castings and perhaps......
welding on grain refinement of weld metal and improvement of solidification crack susceptibility for weld metal and improvement of solidification crack susceptibility for aluminium alloy [J]. Welding... composite design with 31 runs and an algorithm was developed to optimize the fusion zone grain size and the tensile strength of pulsed current gas tungsten arc welded AA6061 aluminium alloy joints......
Grain refinement of AZ31 magnesium alloy by Al-Ti-C-Y master alloy许春香,卢斌峰,吕正玲,梁伟摘 要:Al-Ti-C-Y master alloy was prepared by combining SHS technique 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......
, HUO Yu-ping. Grain refinement effects of Al based alloys with low titanium content produced by electrolysis[J]. Trans Nonferrous Met Soc China, 2002, 12(6): 1121-1126. [10] LIU Zhi-yong, WANG Ming...] LIU Zhi-yong, WANG Ming-xing, WENG Yong-gang, SONG Tian-fu, HUO Yu-ping, XIE Jing-pei. Effect of silicon on grain refinement of aluminum produced by electrolysis[J]. Mater Trans, 2003, 44(10): 2157-2162......
S, CHAKRABORTY M. Poisoning and fading mechanism of grain refinement in Al-7Si alloy [J]. Materials Forum, 2005, 29: 387-393. [6] QIU D, TAYLOR J A, ZHANG M X, KELLY P M. A mechanism... for grain refinement and the undissolved AlB2 particles is the indirect nucleating base for subsequent α(Al) phase. Key words: Al-3B master alloy; hypoeutectic Al-Si alloys; nucleation mechanism; grain......
Effects of Al-10Sr master alloys on grain refinement of AZ31 magnesium alloy YANG Ming-bo(杨明波)1, 2, PAN Fu-sheng(潘复生)2, CHENG Ren-ju(程仁菊)2, TANG Ai-tao(汤爱涛)2 1. College of Materials Science...; Abstract: The effects of Al-10Sr master alloys on grain refinement of AZ31 magnesium alloy were investigated, and the refinement efficiency of different Al-10Sr master alloys (commercial, solubilized......
laths grain to smaller α equiaxed grain. The research results show that the electropulsing treatment is an effective method to refine grain of as-cast TiAl alloy and cold-rolled titanium alloys sheet... ones.Key words:electropulsing; grain refinement; nucleation rate; TiAl alloy; TA15 alloy......