聂海明,杨伟,汪志太

• 1:中航金属材料理化检测科技有限公司
• 2:南昌航空大学轻合金加工科学与技术国防重点学科实验室

摘要(Abstract)：

采用光学显微镜、扫描电镜及能谱仪等研究了AZ91-0. 75 mass%Er合金的快冷组织及其沉淀相的析出行为,分析了不同条件下合金的压缩性能。结果表明:非平衡效应的增强可以有效细化快冷合金晶粒组织,抑制针状Al-Er稀土相形成,促使晶界相以不连续岛状形式分布;经200℃时效处理后,铜模喷铸合金中析出了Mg-Er化合物相,随时效时间延长,析出相的体积分数和尺寸不断增加,其中时效16 h后发生严重的团聚及粗化现象;晶粒细化与固溶强化有利于提高铜模喷铸合金的压缩强度;随时效过程进行,快冷合金的压缩强度先升后降,其中时效8 h后的压缩强度最高可达438. 41 MPa。

关键词(KeyWords)： 非平衡凝固;时效;晶粒细化;沉淀析出;稀土镁合金

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51461032);; 江西省教育厅资助项目(GJJ180513)

作者(Author): 聂海明,杨伟,汪志太

DOI: 10.13289/j.issn.1009-6264.2019-0203

参考文献(References)：

• [1]丁文江．镁合金科学与技术[M]．北京:科学出版社，2007.
• [2]徐玉磊，张奎，李兴刚，等．热处理对压铸AZ91D合金组织及硬度的影响[J]．材料热处理学报，2012,33(11):63-67.XU Yu-lei,ZHANG Kui,LI Xing-gang,et al.Effects of heat treatment on microstructure and hardness of die-casting AZ91D alloy[J].Transactions of Materials and Heat Treatment,2012,33(11):63-67.
• [3]王长义．AZ91HP镁合金疲劳裂纹扩展行为与断裂机理[J]．失效分析与预防，2015,10(2):87-91.WANG Chang-yi. Fatigue crack propagation behavior and mechanism of AZ91HP magnesium alloy[J]. Failure Analysis and Prevention,2015,10(2):87-91.
• [4]杨伟，殷海眯，商景利，等．SiC颗粒参与下快冷镁合金异质形核与高温晶粒长大[J]．中国有色金属学报，2017,27(2):243-250.YANG Wei,YIN Hai-mi,SHANG Jing-li,et al. Heterogeneous nucleation and grain growth at high temperature for quenched magnesium alloy containing Si C particle[J].The Chinese Journal of Nonferrous Metals,2017,27(2):243-250.
• [5] Boby A.Effect of Pb addition on the discontinuous and continuous Mg17Al12-βprecipitate during solidification of AZ91 magnesium alloy[J].Transactions of the Indian Institute of Metals,2013,66(2):105-108.
• [6] Tane M,Nagai Y,Kimizuka H,et al.Elastic properties of an Mg-Zn-Y alloy single crystal with a long-period stacking-ordered structure[J].Acta Materialia,2013,61:6338-6351.
• [7] Srivastava V C,Surreddi K B,Scudino S,et al.Microstructure characteristics of spray formed and heat treated Al-(Y,La)-Ni-Co system[J].Journal of Alloys and Compounds,2013,578:471-480.
• [8]赵亚忠，彭建，刘蒙恩，等．Mg-1. 9Zn-0. 9Mn-x Nd合金铸态组织与力学性能[J]．材料热处理学报，2018,39(6):42-48.ZHAO Ya-zhong,PENG Jian,LIU Meng-en,et al. Microstructure and mechanical properties of as-cast Mg-1. 9Zn-0. 9Mn-x Nd magnesium alloys[J].Transactions of Materials and Heat Treatment,2018,39(6):42-48.
• [9]肖代红，黄伯云．铒对AZ91镁合金铸态组织与力学性能的影响[J]．中国稀土学报，2008,26(1):78-81.XIAO Dai-hong,HUANG Bai-yun. Effect of erbium addition on microstructure and mechanical properties of as-cast AZ91magnesium alloy[J].Journal of the Chinese Rare Earth Society,2008,26(1):78-81.
• [10]刘楚明，葛位维，李慧中，等．Er对铸态AZ91镁合金显微组织和耐腐蚀性能的影响[J]．中国有色金属学报，2009,19(5):847-853.LIU Chu-ming,GE Wei-wei,LI Hui-zhong,et al.Effect of Er on microstructure and corrosion resistance of AZ91 magnesium alloy[J].The Chinese Journal of Nonferrous Metals,2009,19(5):847-853.
• [11]宋雨来，王震，刘耀辉，等．稀土铒、铈改性AZ91镁合金应力腐蚀行为研究[J]．湖南大学学报，2018,45(6):22-27.SONG Yu-lai,WANG Zhen,LIU Yao-hui,et al.Research on stress corrosion behavior of AZ91 magnesium alloy modified by erbium and cerium[J].Journal of Hunan University,2018,45(6):22-27.
• [12] Liu F,Yang G C. Rapid solidification of highly undercooled bulk liquid superalloy recent developments future directions[J].International Materials Reviews,2006,51(3):145-170.
• [13]杨伟，陈寿辉，张守银，等．冷却速率对AZ91D镁合金非平衡凝固组织的影响[J]．中国有色金属学报．2014,24(3):593-599.YANG Wei,CHEN Shou-hui,ZHANG Shou-yin,et al.Effect of cooling rate on non-equilibrium solidified microstructure of AZ91D magnesium alloy[J].The Chinese Journal of Nonferrous Metals,2014,24(3):593-599.
• [14] Chang J,Wang H P,Zhou K,et al.Rapid dendritic growth and solute trapping within undercooled ternary Ni-5%Cu-5%Mo alloy[J].Applied Physics A,2012,109(1):139-143.
• [15] Bai J,Sun Y S,Xue F,et al. Microstructures and creep properties of Mg-4Al-(1-4)La alloys produced by different casting techniques[J].Materials Science and Engineering,2012,552:472-480.
• [16] Li Y B,Chen Y B,Cui H,et al.Microstructure and mechanical properties of spray-formed AZ91 magnesium alloy[J].Materials Characterization,2009,60(3):240-245.
• [17] Yang W P,Guo X F,Lu Z X.TEM microstructure of rapidly solidified Mg-6Zn-1Y-1Ce alloy[J].Transactions of the Nonferrous Metals Society of China,2012,22(4):786-792.
• [18] Cai J,Ma G C,Liu Z,et al.Influence of rapid solidification on the mechanical properties of Mg-Zn-Ce-Ag magnesium alloy[J].Materials Science and Engineering:A,2007,456(1):364-367.
• [19]刘亮，张丽攀，杨伟，等．固溶工艺和纳米Si C添加对快冷镁合金组织及性能的影响[J]．材料热处理学报，2018,39(12):21-28.LIU Liang,ZHANG Li-pan,YANG Wei,et al. Effect of solid solution process and nano Si C addition on microstructure and properties of rapid cooling AZ91 magnesium alloy[J].Transactions of Materials and Heat Treatment,2018,39(12):21-28.
• [20] Uporov S A,Estemirova S K,Chtchelkatchev N M,et al.Anomalous electrical conductivity in rapidly crystallized Cu100-xZrx(x=50-66. 6)alloys[J].Journal of Alloys and Compounds,2015,647:397-401.
• [21]刘馨忆，王晨充，赵彦林，等．多级时效处理对Al-4. 74Zn-2. 13Mg-1. 20Cu合金性能的影响[J]．材料热处理学报，2019,40(5):58-64.LIU Xin-yi,WANG Chen-chong,ZHAO Yan-lin,et al. Effect of multi-stage aging treatment on properties of Al-4. 74Zn-2. 13Mg-1. 20Cu alloy[J].Transactions of Materials and Heat Treatment,2019,40(5):58-64.

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