形变热处理对Mg-4Al-1Si-1Gd合金组织及性能的影响

doi:10.11896/cldb.20080158

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Abstract In order to improve the low performance of AS series wrought magnesium alloy due to the coarse and uneven distribution of the second phase, the extruded Mg-4Al-1Si-1Gd alloys were treated by isothermal aging at 200 °C for 5 h, 10 h and 15 h respectively and equal channel angular pressing (ECAP), the microstructure and tensile properties were analyzed by optical microscope, scanning microscope and tensile test. The results show that with the extension of the isothermal aging time, the grain size increases, and a small amount of large-scale Mg₁₇Al₁₂ phase is precipitated at the grain boundaries. After aging for 10 h, the tensile properties of the alloy at room temperature were better, but the strength and plasticity of the alloy were obviously lower than that of extruded state. The thermal deformation energy and strain accumulation provided by deformable aging promote the full progress of dynamic recrystallization. The grain size was reduced from 10.68 μm in the extruded state to 2.20 μm. The Mg₂Si and Si₃Gd₅ phases were fragmented completely and distributed more uniformly, a large number of granular Mg₁₇Al₁₂ phases were precipitated at the grain boundary, the basic plane texture was weakened obviously, and a new non-basic plane texture component was formed. The tensile strength, yield strength and elongation of Mg₁₇Al₁₂ were increased by 11.7%, 33.7% and 19.9%, respectively. The contribution of fine grain strengthening to yield strength was 42.8 MPa, and that of Orowan strengthening was 4.25 MPa.

Key words： Mg-4Al-1Si-1Gd alloy deformable aging microstructure room-temperature tensile property

Published: 12 November 2021

CLC number:

TG166.4

Fund:Science and Technology Major Project of Shanxi Province (20191102008,20191102007), Innovation and Entrepreneurship Program for College Students in Shanxi Province (2018093),Shanxi Province Scientific Facilities and Instruments Shared Service Platform of Magne-sium-based Materials Electric Impulse Aided forming (201805D141005), Patent Implementation and Promotion Project of Shanxi Province (20200718).

Corresponding Authors: wanghxia1217@163.com

About author:: Yiyao Zhu received her bachelor of engineering degree in June 2020 from Taiyuan University of Technology. In September 2020, she studies in material processing major of Tianjin University, and mainly engages in the research of aluminum alloy and welding structure field.
Hongxia Wang obtained her M.E. degree from Taiyuan University of Technology (TYUT) in 1999 and served in College of Materials Science and Engineering, TYUT till now. She received her doctorate from Taiyuan University of Technology from 2005 to 2010.She is currently a professor and doctoral supervisor of Taiyuan University of Technology and the winner of the Outstanding Academic Achievement Award of Shanxi Universities. The main research direction of the team is advanced material processing and preparation, mainly including the composition design, liquid forming and large plastic deformable of light alloys that composites based on magnesium alloys, and the microstructure and properties of nanoparticle reinforced magnesium matrix composites. She has presided a National Natural Science Foundation Project, 6 provincial major projects and national natural science foundation projects, and participated in and completed more than 10 national and provincial scientific research projects. She published over 60 papers in the domestic and international academic journals by the first author or corresponding author, won 8 national invention patents, obtained province scientific and technological progress a second prize and a third prize by the first accomplisher, won the third prize of provincial technological invention and scientific and technological progress respectively, a second prize of Education Achievement of Shanxi Province and one editor in chief of the teaching material.

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Cite this article:

ZHU Yiyao,FENG Junqiang,ZHANG Zengyao, et al. Effect of Deformation Heat Treatment on Microstructure and Properties of Mg-4Al-1Si-1Gd Alloy[J]. Materials Reports, 2021, 35(20): 20149-20154.

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http://www.mater-rep.com/EN/10.11896/cldb.20080158 OR http://www.mater-rep.com/EN/Y2021/V35/I20/20149

1 Xu Y, Gensch F, Ren Z, et al. Progress in Natural Science: Materials International,2018,28(6),724.
2 Lu S Z, Hellawell A. Metallurgical Transactions A,1987,18(10),1721.
3 Liu W Y, Xu C, Liu M W, et al. Journal of Materials Engineering,2019,47(6),129(in Chinese).
刘文祎,徐聪,刘茂文,等.材料工程,2019,47(6),129.
4 Wang K Y, Wu X F, Gao X Y, et al. Special Casting & Nonferrous Alloys,2018,38(11),1244(in Chinese).
王克研,武晓峰,高欣宇,等.特种铸造及有色合金,2018,38(11),1244.
5 Wang W X, Zhang S, Liu J, et al. Special Casting & Nonferrous Alloys,2014,34(4),346(in Chinese).
王武孝,张莎,刘健,等.特种铸造及有色合金,2014,34(4),346.
6 Bai S M, Yao J P, Liao L L. Special Casting & Nonferrous Alloys,2016,36(12),1337(in Chinese).
柏世梅,尧军平,廖露亮.特种铸造及有色合金,2016,36(12),1337.
7 Zhang Z M, Ma Y, Jia S Z, et al. Materials for Mechanical Engineering,2011,35(3),28(in Chinese).
张忠明,马莹,贾树卓,等.机械工程材料,2011,35(3),28.
8 Wang J W. Study on composition design microstructure and properties of Mg-Al-Si-Sr heat-resistant magnesium alloy.Master’s Thesis, Shandong Jianzhu University,China,2015(in Chinese).
王金伟.Mg-Al-Si-Sr耐热镁合金成分设计与组织性能研究.硕士学位论文,山东建筑大学,2015.
9 Zheng R J. The structure and property of Mg-Al-Si alloy with reciprocation extrusion and modification. Master’s Thesis, Xi’an University of Techno-logy, China,2007(in Chinese).
郑荣军.Mg-Al-Si合金往复挤压及变质处理的组织与性能.硕士学位论文,西安理工大学,2007.
10 Homma T, Kunito N, Kamado S. Scripta Materialia.2009,61(6),644.
11 Lu L L, Yang P, Wang F Q, et al. The Chinese Journal of Nonferrous Metal,2006(6),1034(in Chinese).
路林林,杨平,王发奇,等.中国有色金属学报,2006(6),1034.
12 Huang Q Y. Theoretical and experimental investigations on grain refinement of Mg-Al alloys. Ph.D. Thesis, Chongqing University, China,2016(in Chinese).
黄秋燕.Mg-Al合金铸态晶粒细化理论和实验研究.博士学位论文,重庆大学,2016.
13 Chen B, Lin D L, Zeng X Q, et al. The Chinese Journal of Nonferrous Metal,2010,20(4),613(in Chinese).
陈彬,林栋樑,曾小勤,等.中国有色金属学报,2010,20(4),613.
14 Zhao T T. Effect of deformation and ageing process on the microstructure and properties of a 7N01 alloy. Master’s Thesis, Hunan University, China,2016(in Chinese).
赵甜甜.形变时效组合工艺对7N01铝合金力学性能及微观结构的影响.硕士学位论文,湖南大学,2016.
15 Gong J L. Study on microstructures and properties of Mg12Al-0.7Si alloys modified by Sr and Sb after equal channel angular pressing. Master’s Thesis, Taiyuan University of Technology, China,2012(in Chinese).
龚家林.ECAP挤压对Sr、Sb变质处理Mg12Al-0.7Si合金组织与性能的影响.硕士学位论文,太原理工大学,2012.
16 Xiang J, Han Y F, Le J W, et al.Rare Metal Materials and Engineering,2020,49(3),901(in Chinese).
项娟,韩远飞,乐建温,等.稀有金属材料与工程,2020,49(3),901.
17 Wang H X, Zhou K K, Liang W, et al. The Chinese Journal of Nonferrous Metals,2011,21(8),1794(in Chinese).
王红霞,周康康,梁伟,等.中国有色金属学报,2011,21(8),1794.
18 Zhang H, Wang T L, Liu W Y, et al. Journal of Plasticity Engineering,2017,24(1),36(in Chinese).
张会,王同乐,刘文义,等.塑性工程学报,2017,24(1),36.
19 Yu K, Li W X, Wang R C, et al. Rare Metal Materials and Engineering,2006(11),1748(in Chinese).
余琨,黎文献,王日初,等.稀有金属材料与工程,2006(11),1748.
20 Yang Z, Li J P, Gu Y C, et al. Materials Science and Engineering: A,2007,454-455,274.
21 Wang Q S. The study of electronic mechanism of Al-Mg-Si alloy. Master’s Thesis, Guangxi University,China,2006(in Chinese).
王庆松.Al-Mg-Si合金强化机理的电子理论研究.硕士学位论文,广西大学,2006.
22 Cheng W L, Tian Q W, Yu H, et al. Journal of Magnesium and Alloys,2014,2(4),299.