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20卷    第3期    总第132期    2010年3月

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文章编号:1004-0609(2010)03-0427-08
7050铝合金板在固溶过程中微结构与织构的演变
熊创贤1, 2,邓运来1, 3,万  里1, 3,张新明1, 3

(1. 中南大学 材料科学与工程学院,长沙 410083;
2. 湖南城市学院 土木工程系,益阳 413000;
3. 中南大学 有色金属材料科学与工程教育部重点实验室,长沙 410083
)

摘 要: 采用光学金相(OM)、扫描电镜(SEM)、透射电镜(TEM)、X射线衍射(XRD)和织构材料(ODF)分析等研究7050铝合金热轧板在逐级升温固溶过程中微结构与织构的演变。结果表明:在固溶温度不超过490 ℃的条件下,板材中长条形再结晶晶粒平行于轧向分布,固溶板材与热轧板材的织构组态相似,均含有少量{001}<100>织构,晶粒取向主要聚集在β-取向线和α-取向线上;具有{124}<211>和{112}<111>取向的形变长条形组织由于回复和连续再结晶使其取向逐渐趋同,取向密度增强;最后经(475 ℃, 12 h)处理的样品中残留有Al2CuMg和Al7Cu2Fe相;而经(490 ℃, 4 h)处理的样品中,Al2CuMg相全部溶入基体,Al7Cu2Fe相仍然存在。

 

关键字: 7050铝合金;固溶;微结构;织构;再结晶

Evolutions of microstructures and textures of 7050 Al alloy plate during solution heat treatment
XIONG Chuang-xian1, 2, DENG Yun-lai1, 3, WAN Li1, 3, ZHANG Xin-ming1, 3

1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;
2. Department of Civil Engineering, Hunan City University, Yiyang 413000, China;
3. Key Laboratory of Nonferrous Metal Materials Science and Engineering, Ministry of Education,
Central South University, Changsha 410083, China

Abstract:Evolutions of microstructures and textures of 7050 Al alloy hot rolled plate during solution heat treatment were studied by OM, SEM, TEM, XRD and ODF techniques. The results show that when the samples are heated stage by stage up to 490 ℃, the lamellar grains are still parallel to the rolling direction. The textures of the solution treated samples are similar to the rolled ones. The grain orientations mainly concentrate to β-fiber and α-fiber, in company with a little {001}<100> texture. The orientations densities of {124}<211> and {112}<111> textures increase with the recovery and continuous recrystallization of the deformed lamellar matrix. The sample, which is held at 475 ℃ for 12 h in the last stage during the solution, contains Al2CuMg and Al7Cu2Fe particles. The sample, which is held at 490 ℃ for 4 h in the last stage during the solution, still includes Al7Cu2Fe particles, but excludes Al2CuMg particles.

 

Key words: 7050 Al alloy; solution; microstructure; texture; recrystallization

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

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

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