时效处理对Mg-Y-Gd-Zn-Zr合金中LPSO相演变及性能的影响

doi:10.13251/j.issn.0254-6051.2024.09.016

金属热处理 ›› 2024, Vol. 49 ›› Issue (9): 96-102.DOI: 10.13251/j.issn.0254-6051.2024.09.016

时效处理对Mg-Y-Gd-Zn-Zr合金中LPSO相演变及性能的影响

任广笑¹, 王超^2,3, 曹喜娟¹, 王凯², 王红霞^1,2, 程伟丽², 牛晓峰²

1.山西江淮重工有限责任公司山西省轻金属及其复合材料研发及结构化应用中试基地, 山西晋城 048000;
2.太原理工大学材料科学与工程学院先进镁基材料山西省重点实验室, 山西太原 030024;
3.航空工业陕西宏远航空锻造有限公司, 陕西西安 710000

收稿日期:2024-05-12 修回日期:2024-08-09 出版日期:2024-09-25 发布日期:2024-10-29
通讯作者: 王红霞,教授,博士,E-mail: wanghxia1217@163.com
作者简介:任广笑(1990—),男,工程师,硕士,主要研究方向为轻合金液态成形,E-mail: 15034092049@163.com。
基金资助:
山西省科技成果转化引导专项(202204021301009, 202104021301022);山西省自然科学基金(20210302123135);中央引导地方科技发展资金(YDZJSX20231B003)

Evolution of LPSO phase and properties of Mg-Y-Gd-Zn-Zr alloy at different aging temperatures

Ren Guangxiao¹, Wang Chao^2,3, Cao Xijuan¹, Wang Kai², Wang Hongxia^1,2, Cheng Weili², Niu Xiaofeng²

1. Shanxi Province Pilot Base for Research and Development of Light Metals and Their Composite Materials and Structured Applications, Shanxi Jianghuai Heavy Industry Co., Ltd., Jincheng Shanxi 048000, China;
2. Shanxi Key Laboratory of Advanced Magnesium-Based Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan Shanxi 030024, China;
3. Avic Shaanxi Hongyuan Aviation Forging Company Ltd., Xi'an Shaanxi 710000, China

Received:2024-05-12 Revised:2024-08-09 Online:2024-09-25 Published:2024-10-29

摘要/Abstract

摘要： 利用OM、SEM、XRD、TEM及性能测试等方法研究了铸态、固溶时效态Mg-6Y-3Gd-3Zn-0.5Zr合金微观组织演变及其对力学性能的影响。结果表明,铸态合金由树枝状α-Mg基体、晶界处连续网状18R-LPSO和Mg₂₄(Gd, Y, Zn)₅混合相组成。固溶处理后大部分Mg₂₄(Gd, Y, Zn)₅相与少部分18R-LPSO相回溶到基体内。250 ℃和300 ℃时效处理后,合金基体内析出了大量层片状14H-LPSO、Mg₃(Y, Gd)及Mg₅(Y, Gd)相。400 ℃时效处理后,晶内只析出了14H-LPSO相。铸态合金的抗拉强度和伸长率分别为222.7 MPa和4.1%。时效处理后合金强度均有所下降,伸长率略微上升。400 ℃峰时效合金由于晶内析出的14H-LPSO数量多、尺寸大,抗拉强度下降最多,相比铸态下降了39 MPa。

关键词: Mg-Y-Gd-Zn-Zr合金, LPSO相, 热处理, 力学性能

Abstract: The microstructural evolution of the Mg-6Y-3Gd-3Zn-0.5Zr alloys in the as-cast, solid solution and aging states and its influence on the mechanical properties were investigated by using OM, SEM, XRD, TEM and property testing methods. The results show that the as-cast alloy consists of dendritic α-Mg matrix with a continuous network of 18R-LPSO and Mg₂₄(Gd, Y, Zn)₅ mixed phases at the grain boundaries. After solid solution treatment, the most of Mg₂₄(Gd, Y, Zn)₅ phase and part of the 18R-LPSO phase are dissolved back into the matrix. A large amount of lamellar 14H-LPSO and Mg₃(Y, Gd) and Mg₅(Y, Gd) phases are precipitated in the matrix after aging at 250 ℃ and 300 ℃. Only 14H-LPSO phase is precipitated in the crystals after aging at 400 ℃. The tensile strength and elongation of the as-cast alloy are 222.7 MPa and 4.1%, respectively. The strength of the alloy decreases and the elongation increases slightly after aging. The alloy peak aged at 400 ℃ shows the greatest decrease in strength due to the large number and size of 14H-LPSO precipitated in the crystals, and the tensile strength decreases by 39 MPa compared with that of the as-cast state.

Key words: Mg-Y-Gd-Zn-Zr alloy, LPSO phase, heat treatment, mechanical properties

中图分类号:

TG156.92

任广笑, 王超, 曹喜娟, 王凯, 王红霞, 程伟丽, 牛晓峰. 时效处理对Mg-Y-Gd-Zn-Zr合金中LPSO相演变及性能的影响[J]. 金属热处理, 2024, 49(9): 96-102.

Ren Guangxiao, Wang Chao, Cao Xijuan, Wang Kai, Wang Hongxia, Cheng Weili, Niu Xiaofeng. Evolution of LPSO phase and properties of Mg-Y-Gd-Zn-Zr alloy at different aging temperatures[J]. Heat Treatment of Metals, 2024, 49(9): 96-102.

参考文献

[1]Chen T, Chen Z Y, Shao J B, et al. Evolution of LPSO phases in a Mg-Zn-Y-Gd-Zr alloy during semi-continuous casting, homogenization and hot extrusion[J]. Materials and Design, 2018, 152: 1-9.
[2]Song J F, She J, Pan F S, et al. Latest research advances on magnesium and magnesium alloys worldwide[J]. Journal of Magnesium and Alloys, 2020, 8(1): 1-41.
[3]Kawamura Y, Hayashi K, Inoue A, et al. Rapidly solidified powder metallurgy Mg₉₇Zn₁Y₂ alloys with excellent tensile yield strength above 600 MPa[J]. Materials Transactions, 2001, 42(7): 1172-1176.
[4]Yoshihito K, Michiaki Y. Formation and mechanical properties of Mg₉₇Zn₁RE₂ alloys with long-period stacking ordered structure[J]. Materials Transactions, 2007, 48(11): 2986-2992.
[5]Wu Y J, Zeng X Q, Lin D L, et al. The microstructure evolution with lamellar 14H-type LPSO structure in an Mg_96.5Gd_2.5Zn₁ alloy during solid solution heat treatment at 773 K[J]. Journal of Alloys and Compounds, 2009, 477(1/2): 193-197.
[6]Mohammad S G, Parastoo M K, Amir H A, et al. A review of Mg alloys containing long-period stacking ordered (LPSO) structures with insight into the application of friction stir processing[J]. Journal of Materials Research and Technology, 2023, 24: 4945-4966.
[7]Xu C, Zheng M Y, Xu S W, et al. Microstructure and mechanical properties of rolled sheets of Mg-Gd-Y-Zn-Zr alloy: As-cast versus as-homogenized[J]. Journal of Alloys and Compounds, 2012, 528: 40-44.
[8]Xia X S, Shu D, Yang E C, et al. A comparative study of the role of Zn in microstructures and the mechanical properties of Mg-Gd-Y-Zr alloys[J]. Journal of Materials Research and Technology, 2023, 25: 2903-2912.
[9]Liao H X, Kim J, Song J F, et al. Effect of heat treatment on LPSO morphology and mechanical properties of Mg-Zn-Y-Gd alloys[J]. Journal of Magnesium and Alloys, 2020, 8(4): 1120-1127.
[10]Liao Q Y, Hun W X, Chen R M, et al. Effect of Zn/Y atomic ratio on precipitation behavior and dynamic recrystallization behavior of Mg-Zn-Y alloy under different extrusion temperature[J]. Journal of Materials Research and Technology, 2023, 27: 48-62.
[11]Zhang J H, Xu L J, Jiao Y F, et al. Study of Mg-Ymm-Zn alloys with high-strength at elevated temperatures processed by water-cooled mold casting[J]. Materials Science and Engineering A, 2014, 610: 139-144.
[12]Zhu Y M, Morton A J, Nie J F. The 18R and 14H long-period stacking ordered structures in Mg-Y-Zn alloys[J]. Acta Materialia, 2010, 58(8): 2936-2947.
[13]Yamasaki M, Sasaki M, Nishijima M, et al. Formation of 14H long period stacking ordered structure and profuse stacking faults in Mg-Zn-Gd alloys during isothermal aging at high temperature[J]. Acta Materialia, 2007, 55(20): 6798-6805.
[14]Zhu Y, Morton A J, Nie J F. Growth and transformation mechanisms of 18R and 14H in Mg-Y-Zn alloys[J]. Acta Materialia, 2012, 60(19): 6562-6572.
[15]Yang Z, Wang Z H, Duan H B, et al. Microstructure evolution of Mg-6Gd-2Y alloy during solid solution and aging process[J]. Materials Science and Engineering A, 2015, 6(31): 160-165.
[16]曾小勤, 朱庆春, 李扬欣, 等. 镁合金中的第二相颗粒强化[J]. 中国材料进展, 2019, 38(3): 193-204.
Zeng Xiaoqin, Zhu Qingchun, Li Yangxin, et al. Second phase particle strengthening in magnesium alloys[J]. Materials China, 2019, 38(3): 193-204.
[17]Jin X Z, Xu W C, Shan D B, et al. Mechanism of high-strength and ductility of Mg-RE alloy fabricated by low-temperature extrusion and aging treatment[J]. Materials and Design, 2021, 199: 109384.
[18]Gao H, Ikeda K I, Morikawa T, et al. Analysis of kink boundaries in deformed synchronized long-period stacking ordered magnesium alloys[J]. Materials Letters, 2015, 146: 30-33.
[19]Shao X H, Yang Z Q, Ma X L. Strengthening and toughening mechanisms in Mg-Zn-Y alloy with a long period stacking ordered structure[J]. Acta Materialia, 2010, 58(14): 4760-4771.
[20]Zheng L W, Zhang X P, Wang H X, et al. Synergistic effect of LPSO and eutectic phase on mechanical properties of Mg-Gd-Nd-Zn-Zr alloy during equal channel angular pressing[J]. Journal of Materials Research and Technology, 2021, 15: 2459-2470.
[21]Oorbe E, Gerardo G, Dobes F, et al. High-temperature mechanical behavior of extruded Mg-Y-Zn alloy containing LPSO phases[J]. Metallurgical and Materials Transactions A, 2013, 44(6): 2869-2883.
[22]Zhou J X, Luo X J, Yang H, et al. Introducing lamellar LPSO phase to regulate room and high-temperature mechanical properties of Mg-Gd-Y-Zn-Zr alloys by altering cooling rate[J]. Journal of Materials Research and Technology, 2023, 24: 7258-7269.

时效处理对Mg-Y-Gd-Zn-Zr合金中LPSO相演变及性能的影响

Evolution of LPSO phase and properties of Mg-Y-Gd-Zn-Zr alloy at different aging temperatures

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