Acta Metall Sin  2011, Vol. 47 Issue (12): 1561-1566    DOI: 10.3724/SP.J.1037.2011.00401

论文 Current Issue | Archive | Adv Search |

PREPARATION OF ULTRAFINE–GRAINED COPPER ALLOY PROCESSED BY ANNEALING TREATMENT AFTER MULTI–DIRECTIONAL COMPRESSION

YANG Xuyue, ZHANG Zhiling, WANG Jun, QIN Jia, CHEN Zhiyong

Key Laboratory of Nonferrous Metal Materials Science and Engineering, Ministry of Education, School of Materials Science and Engineering, Central South University, Changsha 410083

YANG Xuyue ZHANG Zhiling WANG Jun QIN Jia CHEN Zhiyong. PREPARATION OF ULTRAFINE–GRAINED COPPER ALLOY PROCESSED BY ANNEALING TREATMENT AFTER MULTI–DIRECTIONAL COMPRESSION. Acta Metall Sin, 2011, 47(12): 1561-1566.

Abstract References Related Articles Recommended Metrics Download:  PDF(1016KB)  Export:  BibTeX | EndNote (RIS)       Abstract  Ultrafine grained (UFG) metallic materials arouse a great interest due to their great mechanical properties. Through the way of severe plastic deformation (SPD), including equal channel angular pressing (ECAP) and high–pressure torsion (HPT), the UFG materials obtained can be of obvious improvement in strength but of decrease in their thermal stability and ductility. In this article, the authors manage to obtain an UFG QBe1.7 copper alloy with great comprehensive properties by annealing the samples after being multi–directional compressioned (MDCed) at room temperature. The multiple tests were carried out using rectangular samples with consequent changing of loading direction in 90? through three of mutually perpendicular axes from pass–to–pass. The deformed and subsequent annealed microstructures were investigated by OM, TEM and SEM/EBSD metallographic observations. The integrated flow curves plotted over a number of compression passes increase to a maximum at moderate strains of 1 to 2 followed by steady–state–like flow at high cumulative strains. Fine grains were not observed even at a higher cumulative stain of Σε=4.8, although there were many sub–grains when the samples were deformed to Σε=2.4. This indicates that the dynamic recrystallization or recovery was completely inhibited by fine precipitates. Static recrystallization (SRX) of the MDCed structure at 973 K was also investigated. With the increment of cumulative strains, the effect of grain refinement became more obvious, but the thermal stability was getting worse. At a medium strain of Σε=2.4, the minimal grain size of 0.8 μm can be developed with an excellent combination property. The formation of ultrafine grain is characterized by large–angle boundaries developed from low to medium boundaries. The change of the average grain size with annealing time can be divided into three stages: a recovery period for grain refinement, rapid grain refinement and normal grain growth. Key words:  copper alloy      multi–directional compression      annealing      ultrafine grain      recrystallization      Received:  28 June 2011      Fund:  Supported by National Natural Science Foundation of China (No.51174234) and Key Project of Central South University Granted by the Fundamental  research Funds for the Central Universities (No.2010QZDD014) Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors YANG Xu-Ti ZHANG Zhi-Ling YU Jun CHEN Zhi-Yong URL:  https://www.ams.org.cn/EN/10.3724/SP.J.1037.2011.00401     OR     https://www.ams.org.cn/EN/Y2011/V47/I12/1561 [1] Armstrong R W. Metall Mater Trans, 1970; 1: 1169 [2] Hansen N. Scr Mater, 2004; 51: 801 [3] Mishra A, Kad B K, Gregori F, Meyers M A. Acta Mater, 2007; 55: 13 [4] Valiev R Z, Islamgaliev R K, Alexandrov I V. Prog Mater Sci, 2000; 45: 103 [5] Wang K, Tao N R, Liu G, Lu J, Lu K. Acta Mater, 2006; 54: 5281 [6] Hosseini S A, Manesh H D. Mater Des, 2009; 30: 2911 [7] Saunders I, Nutting J. Met Sci, 1984; 18: 571 [8] Liu Z Y, Liang G X, Wang E D, Wang Z R. Mater Sci Eng, 1998; A242: 137 [9] Koch C C. Scr Mater, 2003; 49: 657 [10] Jiang Q W, Liu Y, Wang X, Chao Y S, Li X W. Acta Metall Sin, 2009; 45: 873 (姜庆伟, 刘印, 王尧, 晁月盛, 李小武. 金属学报, 2009; 45: 873) [11] Gubicza J, Balogh L, Hellmig R J, Estrin Y, Ungar T. Mater Sci Eng, 2005; A400–401: 334 [12] Molodova X, Gottstein G, Winning M, Hellmig R J. Mater Sci Eng, 2007; A460–461: 204 [13] Gubicza J, Dobatkin S V, Khosravi E, Kuznetsov A A, Labar J L. Mater Sci Eng, 2011; A528: 1828 [14] Takayama A, Yang X, Miura H, Sakai T. Mater Sci Eng, 2008; A478: 221 [15] Armstrong P E, Hockett J E, Sherby O D. J Mech Phys Solids, 1982; 30: 37 [16] Belyakov A, Sakai T, Miura H, Tsuzaki K. Philos Mag, 2001; A81: 2629 [17] Humphreys F J, Hatherly M. Recrystallization and Related Annealing Phenomena, 2nd ed, Oxford: Pergamon press, 2004: 451 [18] Hall E O. Proc Phys Soc London, 1951; B64: 747 [19] Petch N J. J Iron Steel Inst, 1953; 174: 25 [20] Xia S, Li H, Zhou B X, Chen W J. Chin J Nature, 2010; 32: 94 (夏爽, 李慧, 周邦新, 陈文觉. 自然杂志, 2010; 32: 94) [21] Field D P, Bradford L T, Nowell M M, Lillo T M. Acta Mater, 2007; 55: 4233 [1] ZHAO Peng, XIE Guang, DUAN Huichao, ZHANG Jian, DU Kui. Recrystallization During Thermo-Mechanical Fatigue of Two High-Generation Ni-Based Single Crystal Superalloys[J]. 金属学报, 2023, 59(9): 1221-1229. [2] CHANG Songtao, ZHANG Fang, SHA Yuhui, ZUO Liang. Recrystallization Texture Competition Mediated by Segregation Element in Body-Centered Cubic Metals[J]. 金属学报, 2023, 59(8): 1065-1074. [3] LI Fulin, FU Rui, BAI Yunrui, MENG Lingchao, TAN Haibing, ZHONG Yan, TIAN Wei, DU Jinhui, TIAN Zhiling. Effects of Initial Grain Size and Strengthening Phase on Thermal Deformation and Recrystallization Behavior of GH4096 Superalloy[J]. 金属学报, 2023, 59(7): 855-870. [4] LIU Manping, XUE Zhoulei, PENG Zhen, CHEN Yulin, DING Lipeng, JIA Zhihong. Effect of Post-Aging on Microstructure and Mechanical Properties of an Ultrafine-Grained 6061 Aluminum Alloy[J]. 金属学报, 2023, 59(5): 657-667. [5] CHEN Kaixuan, LI Zongxuan, WANG Zidong, Demange Gilles, CHEN Xiaohua, ZHANG Jiawei, WU Xuehua, Zapolsky Helena. Morphological Evolution of Fe-Rich Precipitates in a Cu-2.0Fe Alloy During Isothermal Treatment[J]. 金属学报, 2023, 59(12): 1665-1674. [6] LOU Feng, LIU Ke, LIU Jinxue, DONG Hanwu, LI Shubo, DU Wenbo. Microstructures and Formability of the As-Rolled Mg- xZn-0.5Er Alloy Sheets at Room Temperature[J]. 金属学报, 2023, 59(11): 1439-1447. [7] CHEN Xueshuang, HUANG Xingmin, LIU Junjie, LV Chao, ZHANG Juan. Microstructure Regulation and Strengthening Mechanisms of a Hot-Rolled & Intercritical Annealed Medium-Mn Steel Containing Mn-Segregation Band[J]. 金属学报, 2023, 59(11): 1448-1456. [8] YU Shaoxia, WANG Qi, DENG Xiangtao, WANG Zhaodong. Preparation and Size Effect of GH3600 Nickel-Based Superalloy Ultra-Thin Strips[J]. 金属学报, 2023, 59(10): 1365-1375. [9] JIN Xinyan, CHU Shuangjie, PENG Jun, HU Guangkui. Effect of Dew Point on Selective Oxidation and Decarburization of 0.2%C-1.5%Si-2.5%Mn High Strength Steel Sheet During Continuous Annealing[J]. 金属学报, 2023, 59(10): 1324-1334. [10] WU Caihong, FENG Di, ZANG Qianhao, FAN Shichun, ZHANG Hao, LEE Yunsoo. Microstructure Evolution and Recrystallization Behavior During Hot Deformation of Spray Formed AlSiCuMg Alloy[J]. 金属学报, 2022, 58(7): 932-942. [11] REN Shaofei, ZHANG Jianyang, ZHANG Xinfang, SUN Mingyue, XU Bin, CUI Chuanyong. Evolution of Interfacial Microstructure of Ni-Co Base Superalloy During Plastic Deformation Bonding and Its Bonding Mechanism[J]. 金属学报, 2022, 58(2): 129-140. [12] JIANG Weining, WU Xiaolong, YANG Ping, GU Xinfu, XIE Qingge. Formation of Dynamic Recrystallization Zone and Characteristics of Shear Texture in Surface Layer of Hot-Rolled Silicon Steel[J]. 金属学报, 2022, 58(12): 1545-1556. [13] HU Chen, PAN Shuai, HUANG Mingxin. Strong and Tough Heterogeneous TWIP Steel Fabricated by Warm Rolling[J]. 金属学报, 2022, 58(11): 1519-1526. [14] YANG Ping, WANG Jinhua, MA Dandan, PANG Shufang, CUI Feng'e. Influences of Composition on the Transformation-Controlled {100} Textures in High Silicon Electrical Steels Prepared by Mn-Removal Vacuum Annealing[J]. 金属学报, 2022, 58(10): 1261-1270. [15] PENG Wuqingliang, LI Qiang, CHANG Yongqin, WANG Wanjing, CHEN Zhen, XIE Chunyi, WANG Jichao, GENG Xiang, HUANG Lingming, ZHOU Haishan, LUO Guangnan. A Review on the Development of the Heat Sink of the Fusion Reactor Divertor[J]. 金属学报, 2021, 57(7): 831-844. No Suggested Reading articles found! Viewed Full text Abstract Cited   Shared      Discussed