Research on Semisolid Microstructural Evolution of 2024 Aluminum Alloy Prepared by Powder Thixoforming

doi:10.3390/met5020547

	Research on Semisolid Microstructural Evolution of 2024 Aluminum Alloy Prepared by Powder Thixoforming
	Li, Pubo 2; Chen, Tijun 2; Zhang, Suqing 2; Guan, Renguo 1
刊名	METALS
	2015-06
卷号	5 期号:2 页码:547-564
ISSN号	2075-4701
DOI	10.3390/met5020547
英文摘要	A novel method, powder thixoforming, for net-shape forming of the particle-reinforced Aluminum matrix composites in semi-solid state has been proposed based on powder metallurgy combining with thixoforming technology. The microstructural evolution and phase transformations have been investigated during partial remelting of the 2024 bulk alloy, prepared by cold pressing of atomized alloy powders to clarify the mechanisms of how the consolidated powders evolve into small and spheroidal primary particles available for thixoforming. The effect of heating temperature on the resulting semisolid microstructure has also been discussed. The results indicate that the microstructural evolution includes three stages-the initial rapid coarsening of the fine grains within the powders, the formation of continuous liquid layer on the primary particle surface (the original powder), and the final coarsening-that result from the phase transformations of theta ->alpha, alpha -> L, and alpha -> L and L ->alpha, respectively. The coarsening rate of the primary particles is low, and one original powder always evolves into one spheroidal particle with a continuous liquid layer surface. Properly raising the heating temperature is beneficial for obtaining an ideal semisolid microstructure.
资助项目	Program for New Century Excellent Talents in the University of China[NCET-10-0023]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	MDPI AG
WOS记录号	WOS:000357508400004
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/34045]
专题	材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
通讯作者	Chen, Tijun
作者单位	1.Northeastern Univ, Sch Mat & Met, Shenyang 110004, Peoples R China 2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Li, Pubo,Chen, Tijun,Zhang, Suqing,et al. Research on Semisolid Microstructural Evolution of 2024 Aluminum Alloy Prepared by Powder Thixoforming[J]. METALS,2015,5(2):547-564.
APA	Li, Pubo,Chen, Tijun,Zhang, Suqing,&Guan, Renguo.(2015).Research on Semisolid Microstructural Evolution of 2024 Aluminum Alloy Prepared by Powder Thixoforming.METALS,5(2),547-564.
MLA	Li, Pubo,et al."Research on Semisolid Microstructural Evolution of 2024 Aluminum Alloy Prepared by Powder Thixoforming".METALS 5.2(2015):547-564.