Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第27卷    第3期    总第216期    2017年3月

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文章编号:1004-0609(2017)-03-0486-10
Cu-3.6%Al2O3铜合金细丝加工过程中组织结构演变规律
赵郅磊1,李 周1,肖 柱1, 2

(1. 中南大学 材料科学与工程学院,长沙 410083;
2. 中南大学 粉末冶金国家重点实验室,长沙 410083
)

摘 要: 通过TEM和EBSD等技术,研究Cu-3.6%Al2O3(体积分数)弥散强化铜合金细丝冷拉拔变形过程的显微组织和力学性能的演变规律。研究结果表明:Cu-3.6%Al2O3(体积分数)弥散铜合金基体内分布着大量的纳米级γ-Al2O3弥散强化相,形貌以近球状为主,还有少量尺寸为100~200 nm的呈棒状的γ-Al2O3粒子。在冷拉拔变形过程中,晶粒沿着拉拔方向拉长,硬度增加。随着拉伸的进行,合金的变形织构也在发生转变,当冷拉拔变形率达88%时,发生立方织构(Cube)和铜型织构(Copper)向黄铜织构(Brass)、高斯织构(Goss)和剪切织构(S)的转变;合金的显微组织为由位错缠结形成的带状组织和位错胞结构。

 

关键字: Cu-3.6%Al2O3铜合金;形变织构;显微组织

Structure evolution of Cu-3.6%Al2O3 alloy fine wire during cold drawing
ZHAO Zhi-lei1, LI Zhou1, XIAO Zhu1, 2

1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;
2. Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China

Abstract:The microstructure and mechanical property evolution of Cu-3.6%Al2O3 (volume fraction) alloy fine wire during cold drawing were studied by TEM and EBSD. The results show that the massive nano-scale γ-Al2O3 particles with near spherical like dispersively distribute on the matrix of the alloy strengthening phase, meanwhile, some rod-like particles with size of 100-200 nm also appear. During cold drawing, the grains are elongated and the hardness increases. With drawing process, the deformation texture of alloy changes, as the deformation reduction approaches 88%, the cube texture and copper texture transform to Brass texture, Goss texture and S texture. The microstructures of alloy are composed of banded structure and dislocation cell one formed by dislocation.

 

Key words: Cu-3.6%Al2O3 alloy; deformation texture; microstructure

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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