Cu-0.8Mg-0.15Ce合金热变形行为与机制研究
|
摘要
通过Gleeble-1500D热模拟试验机,进行了Cu-0.8Mg-0.15Ce合金的等温压缩试验,变形温度范围为500～850℃,变形速率范围为0.001～10 s~(-1)。研究了不同条件下流变应力的变化规律、合金的热加工图以及合金变形机制,分析了变形温度、变形速率和流变应力之间的关系。结果表明:合金在热变形过程中,其真应力-真应变曲线表现出明显的加工硬化、动态回复和再结晶特点,随着变形温度的升高和变形速率的降低,其流变应力和峰值应力不断降低;可用双曲正弦本构关系来描述热变形过程中的流变应力,计算出合金热变形过程中的激活能为Q=281.47 kJ·mol~(-1),在此基础上构建了该合金的本构方程;合金在热变形过程中的最优加工参数为:变形温度800～850℃,变形速率0.001～0.1 s~(-1)。
The isothermal compression test of the Cu-0.8 Mg-0.15 Ce alloy was carried out on the Gleeble-1500 D thermal simulator in the strain temperature range of 500～850 ℃ and the strain rate range of 0.001～10 s~(-1). The curves of flow stress and strain under different temperatures and deformation rates were investigated, and the processing map and deformation mechanism of the alloy were studied. The relationship between strain temperature, strain rate and flow stress was analyzed. The results showed that the true stress-strain curves of the alloy present obvious work hardening, dynamic recovery and recrystallization characteristics during hot deformation, with the increase of deformation temperature and decreasing strain rate, the flow stress and peak stress decrease continuously. The rheological thermal deformation was described by the hyperbolic sine constitutive relation during stress, and the activation energy of hot deformation of the alloy was 281.47 kJ·mol~(-1). In this experiment, the hot deformation optimal processing parameters of the alloy could also be attained that the strain temperature was 800～850 ℃ and the strain rate was 0.001～0.1 s~(-1).
The isothermal compression test of the Cu-0.8 Mg-0.15 Ce alloy was carried out on the Gleeble-1500 D thermal simulator in the strain temperature range of 500～850 ℃ and the strain rate range of 0.001～10 s~(-1). The curves of flow stress and strain under different temperatures and deformation rates were investigated, and the processing map and deformation mechanism of the alloy were studied. The relationship between strain temperature, strain rate and flow stress was analyzed. The results showed that the true stress-strain curves of the alloy present obvious work hardening, dynamic recovery and recrystallization characteristics during hot deformation, with the increase of deformation temperature and decreasing strain rate, the flow stress and peak stress decrease continuously. The rheological thermal deformation was described by the hyperbolic sine constitutive relation during stress, and the activation energy of hot deformation of the alloy was 281.47 kJ·mol~(-1). In this experiment, the hot deformation optimal processing parameters of the alloy could also be attained that the strain temperature was 800～850 ℃ and the strain rate was 0.001～0.1 s~(-1).
引文
[1] 雷静果, 刘平, 赵冬梅, 康布熙, 田保红. 用导电率研究Cu-Ni-Si-Cr合金时效早期相变动力学 [J]. 材料热处理学报, 2003, 24(4): 22.Lei J G, Liu P, Zhao D M, Kang B X, Tian B H. Study on the transformation kinetics of early stage aging of Cu-Ni-Si Alloy by measuring the electric conductivity [J]. Transactions of Materials and Heat Treatment, 2003, 24(4): 22.
[2] Lu D P, Wang J, Zeng W J. Study on high-strength and High-conductivity Cu-Fe-P alloys [J]. Mater. Sci. Eng. A, 2006, 421(1): 254.
[3] Murashkin M Y, Sabirov I, Sauvage X, Valiev R Z. Nanostructured Al and Cu alloys with superior srength and electrical conductivity [J]. J. Mater. Sci., 2016, 51(1): 33.
[4] 陆德平, 王俊, 陆磊, 刘勇, 谢仕芳, 孙宝德. 硼和铈对Cu-Fe-P合金显微组织和性能的影响 [J]. 中国稀土学报, 2006, 24(4): 475.Lu D P, Wang J, Lu L, Liu Y, Xie S F, Sun B D. Effects of boron and cerium on microstructure and properties of Cu-Fe-P alloy [J]. Journal of the Chinese Society of Rare Earths, 2006, 24(4): 475.
[5] Bi L M, Liu P, Chen X H, Liu X K, Li W, Ma F C. Analysis of phase in Cu-15%Cr-0.24%Zr alloy [J]. Trans. Nonferrous Met. Soc. China, 2013, 23(5): 1342.
[6] 胡勇, 饶丽, 黎秋萍. 稀土Ce含量对AZ91D镁合金组织和性能的影响 [J]. 材料热处理学报, 2014, 35(4): 99.Hu Y, Rao L, Li Q P. Effect of Ce content on microstructure and properties of AZ91D magnesium alloy [J]. Transactions of Materials and Heat Treatment, 2014, 35(4): 99.
[7] 杨吉春, 杨昌桥. 铈对IF钢热变形行为的影响 [J]. 中国稀土学报, 2014, 32(3): 346.Yang J C, Yang C Q. Effects of cerium on hot deformation behavior of IF steel [J]. Journal of the Chinese Society of Rare Earths, 2014, 32(3): 346.
[8] 赵瑞龙, 刘勇, 田保红, 张晓伟, 张毅. 纯铜的高温变形行为 [J]. 金属热处理, 2011, 36(8): 16.Zhao R L, Liu Y, Tian B H, Zhang X W, Zhang Y. High temperature deformation behavior of pure copper [J]. Heat Treatment of Metals, 2011, 36(8): 16.
[9] 邱正晓. 铜镁合金接触线的工艺创新及技术优势分析 [J]. 铁道建筑技术, 2015, (9): 99.Qiu Z X. Technological innovation and analysis of technological advantages of Cu-Mg alloy contact wire [J]. Railway Construction Technology, 2015, (9): 99.
[10] 赵艳君, 蒋长标, 武鹏远, 胡治柳, 罗国杰. 含稀土高镁铝合金热变形行为研究 [J]. 中国稀土学报, 2017, 35(3): 368.Zhao Y J, Jiang C B, Wu P Y, Hu Z L, Luo G J. Hot deformation behaviors of high magnesium aluminum alloy containing rare earth [J]. Journal of the Chinese Society of Rare Earths, 2017, 35(3): 368.
[11] Han K, Walsh R P, Ishmaku A, Toplosky V, Brandao L, Embury J D. High strength and high electrical conductivity bulk Cu [J]. Philos. Mag., 2004, 84(34): 3705.
[12] Correia J B, Davies H A, Sellars C M. Strengthening in rapidly solidified age hardened Cu-Cr and Cu-Cr-Zr alloys [J]. Acta Mater., 1997, 45(1): 177.
[13] 刘文, 王梦寒, 冉云兰. 超高强度钢热成形冷却过程数值模拟 [J]. 热加工工艺, 2012, 41(3): 78.Liu W, Wang M H, Ran Y L. Numerical simulation of cooling process for hot forming ultrahigh strength steel [J]. Hot Working Technology, 2012, 41(3): 78.
[14] Sellars C M, McTegart W J. On the mechanism of hot deformation [J]. Acta Metall., 1966, 14(9): 1136.
[15] Zener C, Hollomon J H. Effect of strain rate upon plastic flow of steel [J]. J. Appl. Phys., 1944, 15(1): 22.
[16] Sellars C M, Whiteman J A. Recrystallization and Grain Growth in Hot Rolling [J]. Met. Sci., 1979, 13(3-4): 22.
[17] 田卡, 田保红, 刘勇, 张毅, 宋克兴, 杜勇. 铈对Cu-Zr合金热变形激活能和性能的影响 [J]. 中国稀土学报, 2016, 34(4): 432.Tian K, Tian B H, Liu Y, Zhang Y, Song K X, Du Y. Effects of cerium on hot deformation activation energy and properties of Cu-Zr alloy [J]. Journal of the Chinese Society of Rare Earths, 2016, 34(4): 432.
[18] Prasad Y, Rao K P. Processing maps for hot deformation of rolled AZ31 magnesium alloy plate: Anistropy of hot workability [J]. Mater. Sci. Eng. A, 2012, 487(2): 316.
[19] 李艳, 刘勇, 张毅, 柴哲, 朱顺新. Cu-0.4Zr-0.15Ce合金热压缩力学行为及热加工图 [J]. 中国稀土学报, 2016, 34(2): 221.Li Y, Liu Y, Zhang Y, Chai Z, Zhu S X. Hot compression deformation behavior and processing map of Cu-0.4Zr-0.15Ce alloy [J]. Journal of the Chinese Society of Rare Earths, 2016, 34(2): 221.
[2] Lu D P, Wang J, Zeng W J. Study on high-strength and High-conductivity Cu-Fe-P alloys [J]. Mater. Sci. Eng. A, 2006, 421(1): 254.
[3] Murashkin M Y, Sabirov I, Sauvage X, Valiev R Z. Nanostructured Al and Cu alloys with superior srength and electrical conductivity [J]. J. Mater. Sci., 2016, 51(1): 33.
[4] 陆德平, 王俊, 陆磊, 刘勇, 谢仕芳, 孙宝德. 硼和铈对Cu-Fe-P合金显微组织和性能的影响 [J]. 中国稀土学报, 2006, 24(4): 475.Lu D P, Wang J, Lu L, Liu Y, Xie S F, Sun B D. Effects of boron and cerium on microstructure and properties of Cu-Fe-P alloy [J]. Journal of the Chinese Society of Rare Earths, 2006, 24(4): 475.
[5] Bi L M, Liu P, Chen X H, Liu X K, Li W, Ma F C. Analysis of phase in Cu-15%Cr-0.24%Zr alloy [J]. Trans. Nonferrous Met. Soc. China, 2013, 23(5): 1342.
[6] 胡勇, 饶丽, 黎秋萍. 稀土Ce含量对AZ91D镁合金组织和性能的影响 [J]. 材料热处理学报, 2014, 35(4): 99.Hu Y, Rao L, Li Q P. Effect of Ce content on microstructure and properties of AZ91D magnesium alloy [J]. Transactions of Materials and Heat Treatment, 2014, 35(4): 99.
[7] 杨吉春, 杨昌桥. 铈对IF钢热变形行为的影响 [J]. 中国稀土学报, 2014, 32(3): 346.Yang J C, Yang C Q. Effects of cerium on hot deformation behavior of IF steel [J]. Journal of the Chinese Society of Rare Earths, 2014, 32(3): 346.
[8] 赵瑞龙, 刘勇, 田保红, 张晓伟, 张毅. 纯铜的高温变形行为 [J]. 金属热处理, 2011, 36(8): 16.Zhao R L, Liu Y, Tian B H, Zhang X W, Zhang Y. High temperature deformation behavior of pure copper [J]. Heat Treatment of Metals, 2011, 36(8): 16.
[9] 邱正晓. 铜镁合金接触线的工艺创新及技术优势分析 [J]. 铁道建筑技术, 2015, (9): 99.Qiu Z X. Technological innovation and analysis of technological advantages of Cu-Mg alloy contact wire [J]. Railway Construction Technology, 2015, (9): 99.
[10] 赵艳君, 蒋长标, 武鹏远, 胡治柳, 罗国杰. 含稀土高镁铝合金热变形行为研究 [J]. 中国稀土学报, 2017, 35(3): 368.Zhao Y J, Jiang C B, Wu P Y, Hu Z L, Luo G J. Hot deformation behaviors of high magnesium aluminum alloy containing rare earth [J]. Journal of the Chinese Society of Rare Earths, 2017, 35(3): 368.
[11] Han K, Walsh R P, Ishmaku A, Toplosky V, Brandao L, Embury J D. High strength and high electrical conductivity bulk Cu [J]. Philos. Mag., 2004, 84(34): 3705.
[12] Correia J B, Davies H A, Sellars C M. Strengthening in rapidly solidified age hardened Cu-Cr and Cu-Cr-Zr alloys [J]. Acta Mater., 1997, 45(1): 177.
[13] 刘文, 王梦寒, 冉云兰. 超高强度钢热成形冷却过程数值模拟 [J]. 热加工工艺, 2012, 41(3): 78.Liu W, Wang M H, Ran Y L. Numerical simulation of cooling process for hot forming ultrahigh strength steel [J]. Hot Working Technology, 2012, 41(3): 78.
[14] Sellars C M, McTegart W J. On the mechanism of hot deformation [J]. Acta Metall., 1966, 14(9): 1136.
[15] Zener C, Hollomon J H. Effect of strain rate upon plastic flow of steel [J]. J. Appl. Phys., 1944, 15(1): 22.
[16] Sellars C M, Whiteman J A. Recrystallization and Grain Growth in Hot Rolling [J]. Met. Sci., 1979, 13(3-4): 22.
[17] 田卡, 田保红, 刘勇, 张毅, 宋克兴, 杜勇. 铈对Cu-Zr合金热变形激活能和性能的影响 [J]. 中国稀土学报, 2016, 34(4): 432.Tian K, Tian B H, Liu Y, Zhang Y, Song K X, Du Y. Effects of cerium on hot deformation activation energy and properties of Cu-Zr alloy [J]. Journal of the Chinese Society of Rare Earths, 2016, 34(4): 432.
[18] Prasad Y, Rao K P. Processing maps for hot deformation of rolled AZ31 magnesium alloy plate: Anistropy of hot workability [J]. Mater. Sci. Eng. A, 2012, 487(2): 316.
[19] 李艳, 刘勇, 张毅, 柴哲, 朱顺新. Cu-0.4Zr-0.15Ce合金热压缩力学行为及热加工图 [J]. 中国稀土学报, 2016, 34(2): 221.Li Y, Liu Y, Zhang Y, Chai Z, Zhu S X. Hot compression deformation behavior and processing map of Cu-0.4Zr-0.15Ce alloy [J]. Journal of the Chinese Society of Rare Earths, 2016, 34(2): 221.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |