冷拉伸预变形及热处理对Hastelloy C-276合金晶界特征的影响

doi:10.13251/j.issn.0254-6051.2021.07.003

摘要/Abstract

摘要： 对Hastelloy C-276合金分别进行2%、6%、14%、22%、30%和54%冷拉伸预形变后经1100 ℃×15 min等温退火并水冷,采用EBSD技术分析变形量对其合金晶界特征分布和晶粒尺寸的影响。结果表明,随着变形量的增加,总的特殊晶界比例呈先下降后上升最后下降的趋势。当变形量为14%时,总的特殊晶界比例出现峰值点,达到了64.8%,同时Σ1晶界比例出现拐点,呈下降趋势,变形储存能得以释放,有利于特殊晶界的产生。此时,晶粒组织处于再结晶初始阶段。但大变形条件下的退火并不利于特殊晶界比例的提高。随着晶粒尺寸的增加,退火孪晶密度降低,选择适当的晶粒尺寸有利于晶界特征分布优化。

关键词: 冷变形, 热处理, 退火孪晶, 晶界特征分布, 孪晶密度

Abstract: Hastelloy C-276 alloy was cold tensile deformed for 2%, 6%, 14%, 22%, 30% and 54%, respectively, then isothermally annealed at 1100 ℃ for 15 min and water cooled. Effects of deformation on the grain boundary characteristic distribution and on the grain size of the alloy were analyzed by EBSD technology. The results show that the total special grain boundary ratio shows a trend of decreasing first, then increasing and finally decreasing. When the deformation is up to 14%, the total proportion of special boundary reaches its peak point as to 64.8%; the Σ1 grain boundary proportion appears inflection point then tends to decrease, and the deformation storage energy can be released so the special grain boundary formation is promoted. At this time, the grain structure is in the initial stage of recrystallization. However, annealing under large deformation conditions is not conducive to increase the proportion of special grain boundaries. With the increase of grain size, the density of annealing twin decreases, so to optimize the grain size is conducive to the optimization of grain boundary character distribution.

Key words: cold deformation, heat treatment, annealing twin, grain boundary character distribution(GBCD), twin density

中图分类号:

TG111

刘翊安, 张晓宇, 孙欢迎, 庞国星, 吴伟. 冷拉伸预变形及热处理对Hastelloy C-276合金晶界特征的影响[J]. 金属热处理, 2021, 46(7): 13-17.

Liu Yian, Zhang Xiaoyu, Sun Huanying, Pang Guoxing, Wu Wei. Influence of cold tensile pre-deformation and heat treatment on grain boundary characteristics of Hastelloy C-276 alloy[J]. Heat Treatment of Metals, 2021, 46(7): 13-17.

参考文献

[1] 茹祥坤, 刘廷光, 夏爽, 等. 形变及热处理对白铜B10合金晶界特征分布的影响[J]. 中国有色金属学报, 2013, 23(8): 2176-2181.
Ru Xiangkun, Liu Tingguang, Xia Shuang, et al. Effect of deformation and heat-treatment on grain boundary distribution character of cupronickel B10 alloy[J]. The Chinese Journal of Nonferrous Metals, 2013, 23(8): 2176-2181.
[2] 方晓英, 刘志勇, Tikhonova M, 等. 多向锻造和单向轧制304不锈钢高温退火后的晶界面分布[J]. 金属学报, 2012, 48(8): 895-906.
Fang Xiaoying, Liu Zhiyong, Tikhonova M, et al. Grain boundary plane distributions in 304 steel annealed at high temperature after a parallel processing of multiple forging and direct rolling[J]. Acta Metallurgica Sinica, 2012, 48(8): 895-906.
[3] 韩涛, 方晓英, 李宁, 等. 晶界特征分布优化改善304不锈钢晶间腐蚀研究[J]. 热加工工艺, 2011, 40(14): 59-61, 109.
Han Tao, Fang Xiaoying, Li Ning, et al. Grain boundary character distribution improving intergranular corrosion of 304 stainless steel[J]. Hot Working Technology, 2011, 40(14): 59-61, 109.
[4] 胡长亮, 夏爽, 李惠, 等. 晶界网络特征对304不锈钢晶间应力腐蚀开裂的影响[J]. 金属学报, 2011, 47(7): 939-945.
Hu Changliang, Xia Shuang, Li Hui, et al. Effect of grain boundary network on the intergranular stress corrosion cracking of 304 stainless steel[J]. Acta Metallurgica Sinica, 2011, 47(7): 939-945.
[5] Randle V. Twinning-related grain boundary engineering[J]. Acta Materialia, 2004, 52(14): 4067-4081.
[6] Randle V, Owen G. Mechanisms of grain boundary engineering[J]. Acta Materialia, 2006, 54(7): 1777-1783.
[7] 王卫国, 方晓英, 蔡正旭, 等. 晶粒尺寸对冷轧退火纯Cu晶界特征分布的影响[J]. 金属学报, 2010, 46(7): 769-774.
Wang Weiguo, Fang Xiaoying, Cai Zhengxu, et al. Effect of grain size on the grain boundary character distributions of cold rolled and annealed pure copper[J]. Acta Metallurgica Sinica, 2010, 46(7): 769-774.
[8] Hu C, Shuang X, Hui L, et al. Improving the intergranular corrosion resistance of 304 stainless steel by grain boundary network control[J]. Corrosion Science, 2011, 53(5): 1880-1886.
[9] Shimada M, Kokawa H, Wang Z J, et al. Optimization of grain boundary character distribution for intergranular corrosion resistant 304 stainless steel by twin-induced grain boundary engineering[J]. Acta Materialia, 2002, 50(9): 2331-2341.
[10] Lin P, Palumbo G, Erb U, et al. Influence of grain boundary character distribution on sensitization and intergranular corrosion of alloy 600[J]. Scripta Metallurgica et Materiali, 1995, 33(9): 1387-1392.
[11] 李慧, 夏爽, 周邦新, 等. 690合金中晶界网络分布的控制及其对晶间腐蚀性能的影响[J]. 中国材料进展, 2011, 30(5): 11-14.
Li Hui, Xia Shuang, Zhou Bangxin, et al. Controlling the grain boundary network to enhance the intergranular corrosion resistance in alloy 690[J]. Materials China, 2011, 30(5): 11-14.
[12] Wang W, Guo H. Effects of thermo-mechanical iterations on the grain boundary character distribution of Pb-Ca-Sn-Al alloy[J]. Materials Science and Engineering A, 2007, 445: 155-162.
[13] Qiang Z, Tang R, Yin K, et al. Corrosion behavior of Hastelloy C-276 in supercritical water[J]. Corrosion Science, 2009, 51(9): 2092-2097.
[14] Li Z, Han J S, Lu J J, et al. Cavitation erosion behavior of Hastelloy C-276 nickel-based alloy[J]. Journal of Alloys and Compounds, 2015, 619(20): 754-759.
[15] 李海丰, 范洪远, 张强, 等. C-276合金在650 ℃/25 MPa超临界水中的腐蚀行为[J]. 原子能科学技术, 2011, 45(7): 822-827.
Li Haifeng, Fan Hongyuan, Zhang Qiang, et al. Corrosion behavior of C-276 alloy in supercritical water at 650 ℃/25 MPa[J]. Atomic Energy Science and Technology, 2011, 45(7): 822-827.
[16] Jin S, He X, Li T, et al. Microstructural evolution in nickel alloy C-276 after Ar-ion irradiation at elevated temperature[J]. Materials Characterization, 2012, 72: 8-14.
[17] Watanabe T. Grain boundary design and control for high temperature materials[J]. Materials Science and Engineering A, 1993, 166(1/2): 11-28.
[18] Shimada M, Kokawa H, Wang Z J, et al. Optimization of grain boundary character distribution for intergranular corrosion resistant 304 stainless steel by twin-induced grain boundary engineering[J]. Acta Materialia, 2002, 50(9): 2331-2341.
[19] Xia S, Hui L, Liu T G, et al. Appling grain boundary engineering to alloy 690 tube for enhancing intergranular corrosion resistance[J]. Journal of Nuclear Materials, 2011, 416(3): 303-310.
[20] Brandon D G. The structure of high-angle grain boundaries[J]. Acta Metallurgica, 1966, 14(11): 1479-1484.
[21] Fang X, Zhang K, Guo H, et al. Twin-induced grain boundary engineering in 304 stainless steel[J]. Materials Science and Engineering A, 2007, 487(1/2): 7-13.
[22] 王卫国, 周邦新, 冯柳, 等. 冷轧变形Pb-Ca-Sn-Al合金在回复和再结晶过程中的晶界特征分布[J]. 金属学报, 2006, 42(7): 715-721.
Wang Weiguo, Zhou Bangxin, Feng Liu, et al. Grain boundary character distributions (GBCD) of cold-rolled Pb-Ca-Sn-Al alloy during recovery and recrystallization[J]. Acta Metallurgica Sinica, 2006, 42(7): 715-721.
[23] 饶聪, 林燕, 王卫国. Pb-Ca-Sn-Al合金Σ3晶界的形成条件[J]. 金属热处理, 2017, 42(10): 184-188.
Rao Cong, Lin Yan, Wang Weiguo. Formation condition of Σ3 grain boundaries in a Pb-Ca-Sn-Al alloy[J]. Heat Treatment of Metals, 2017, 42(10): 184-188.