热处理对Ti<sub>2</sub>AlNb合金显微组织与力学性能的影响

牟义强; 徐瑞; 程超; 于帅; 刘玉敬; 徐勤思; 赵子博

doi:10.7513/j.issn.1004-7638.2026.04.005

热处理对Ti₂AlNb合金显微组织与力学性能的影响

doi: 10.7513/j.issn.1004-7638.2026.04.005

牟义强^{1, 2,},
徐瑞¹,
程超^3, ,,
于帅^{2, 4},
刘玉敬³,
徐勤思¹,
赵子博^{3, 5}

1.
沈阳航空航天大学民用航空学院, 辽宁沈阳 110136
2.
中国科学院金属研究所, 辽宁沈阳 110016
3.
宝鸡西工钛合金制品有限公司昱华先进材料研究院, 陕西宝鸡 721300
4.
中国科学技术大学材料科学与工程学院, 辽宁沈阳 110016
5.
秦创原(宝鸡)产业创新研究院有限公司, 陕西宝鸡 721000

详细信息

作者简介:
牟义强，1985年出生，男，辽宁丹东人，博士，讲师，主要从事钛合金方面的基础研究工作，E-mail：myq@sau.edu.cn

通讯作者:
程超，1991年出生，男，湖南岳阳人，博士，主要从事钛合金热加工研究工作，E-mail：15524389485@163.com

中图分类号: TF044
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出版历程
- 收稿日期: 2026-01-29
- 录用日期: 2026-03-09
- 修回日期: 2026-02-26
- 刊出日期: 2026-08-31

Effect of heat treatment on the microstructure and mechanical properties of Ti₂AlNb alloys

MU Yiqiang^{1, 2
,},
XU Rui¹,
CHENG Chao^{3
, ,},
YU shuai^{2, 4},
LIU yujing³,
XU Qinsi¹,
ZHAO Zibo^{3, 5}

1.
Civil Aviation College, Shenyang Aerospace University, Shenyang 110136, Liaoning, China
2.
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China
3.
Yuhua Institute of Advanced Materials, Baoji Xigong Ti Alloy Products Co., Ltd., Baoji 721300, Shaanxi, China
4.
University of Science and Technology of China, School of Materials Science and Engineering, Shenyang 110016, Liaoning, China
5.
Qinchuangyuan (Baoji) Institute of Industrial Innovation Co., Ltd., Baoji 721000, Shaanxi China

摘要

摘要: 提出一种双重固溶+时效的热处理工艺：通过控制一重固溶温度来调控α₂相的体积分数，并抑制局部再结晶；二重固溶促使粗板条O相沿亚晶界析出，以改善合金的塑性变形能力；随后通过时效以获得大量的细针状O相来提升合金的强度。试验结果表明：合金经该热处理工艺获得由等轴α₂+双尺寸板条O相组成的三态组织，室温塑性可达7.5%，且750 ℃抗拉强度达到837 MPa，实现了合金强塑性的协同提升。
- 热处理 /
- Ti₂AlNb合金 /
- 显微组织 /
- 力学性能
Abstract: This study proposed a duplex solution and aging heat treatment strategy. The volume fraction of the α₂ phase was tailored by controlling the primary solution-treatment temperature, while localized recrystallization was simultaneously suppressed. The secondary solution treatment promoted the precipitation of coarse lamellar O phase along subgrain boundaries, thereby improving the plastic deformability of the alloy. Subsequent aging induced a high density of fine acicular O-phase precipitates, which further enhanced the alloy strength. Through this heat-treatment route, a trimodal microstructure consisting of equiaxed α₂ grains and dual-scale lamellar O phases was obtained. The treated alloy exhibited a room-temperature elongation of 7.5% and a tensile strength of 837 MPa at 750 ℃, demonstrating a synergistic improvement in strength and ductility.
- Ti₂AlNb alloy /
- heat treatment /
- microstructure /
- mechanical properties

HTML全文

图 1 Ti₂AlNb合金热处理流程

Figure 1. Heat treatment process for Ti₂AlNb alloy

下载: 全尺寸图片幻灯片

图 2 Ti₂AlNb合金棒材锻态组织形貌

(a)(b) 金相; (c) SEM

Figure 2. Microstructure of the forged Ti₂AlNb alloy bar

下载: 全尺寸图片幻灯片

图 3 Ti₂AlNb合金棒材锻态性能

Figure 3. Mechanical properties of the forged Ti₂AlNb alloy bar

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图 4 Ti₂AlNb合金棒材1030 ℃热处理态组织形貌

(a)(b) 金相; (c) SEM

Figure 4. Microstructure of the Ti₂AlNb alloy bar after heat treatment at 1030 ℃

下载: 全尺寸图片幻灯片

图 5 Ti₂AlNb合金棒材1040 ℃热处理态组织形貌

(a)(b) 金相; (c) SEM

Figure 5. Microstructure of the Ti₂AlNb alloy bar after heat treatment at 1040 ℃

下载: 全尺寸图片幻灯片

图 6 不同固溶态EBSD分析

1030 ℃: (a1) IPF图, (a2) KAM图, (a3) KAM分布频率与GND数值; 1040 ℃: (b1) IPF图, (b2) KAM图, (b3) KAM分布频率与GND数值

Figure 6. Different solid solution states EBSD analysis

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图 7 Ti₂AlNb合金棒材一重热处理性能

Figure 7. Mechanical properties of the Ti₂AlNb alloy bar after the first-step heat treatment

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图 8 Ti₂AlNb合金棒材两重热处理态SEM组织形貌

Figure 8. SEM micrographs of the T_i2AlNb alloy bar after the two-step heat treatment

(a) 1010 ℃+965 ℃; (b) 1010 ℃+985 ℃; (c) 1010 ℃+1005 ℃

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图 9 Ti₂AlNb合金棒材1030 ℃+985 ℃两重热处理后EBSD分析

(a) IPF图; (b) 相图; (c) B2相与O相极图

Figure 9. EBSD characterization of the Ti₂AlNb alloy bar after the two-step heat treatment at 1030 ℃ and 985 ℃

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图 10 10 Ti₂AlNb合金棒材1030 ℃+1005 ℃两重热处理后EBSD分析

(a) IPF图; (b) 相图; (c) KAM图

Figure 10. EBSD characterization of the Ti₂AlNb alloy bar after the two-step heat treatment at 1030 ℃ and 1005 ℃

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图 11 Ti₂AlNb合金棒材二重热处理性能

Figure 11. Mechanical properties of the Ti₂AlNb alloy bar in the as-forged and two-step heat-treated conditions

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图 12 Ti₂AlNb合金棒材三重热处理态组织形貌

(a)，(b) 金相; (c) SEM

Figure 12. Microstructure of the Ti₂AlNb alloy bar after the three-step heat treatment

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图 13 Ti₂AlNb合金棒材三重热处理性能

Figure 13. Mechanical properties of the Ti₂AlNb alloy bar in the as-forged and three-step heat-treated conditions

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图 14 Ti₂AlNb合金三重热处理态棒材的不同温度的拉伸断口形貌

(a1) (a2) 室温; (b1) (b2) 750 ℃

Figure 14. Tensile fracture morphologies of Ti₂AlNb alloy rods at different temperatures

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表 1 Ti₂AlNb合金的实测化学分析与气体分析

Table 1. Chemical and gas analysis of the studied alloy %

Al Nb Mo O N H

Nominal 22 24 0.5
Actual 21.7 23.7 0.52 0.071 0.0070 0.0008

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参考文献(21)

[1]	刘巧沐, 吴杰, 陈玉龙, 等. 热等静压温度和粉末粒度对Ti₂AlNb合金组织与性能的影响[J]. 材料研究学报, 2019, 33(3): 161-169. Liu Qiaomu, Wu Jie, Chen Yulong, et al. Effect of temperature and powder particle size on mechanical properties and microstructure of PM Ti₂AlNb alloy prepared via hot isostatic pressing[J]. Chinese Journal of Materials Research, 2019, 33(3): 161-169. doi: 10.11901/1005.3093.2018.509 Liu Qiaomu, Wu Jie, Chen Yulong, et al. Effect of temperature and powder particle size on mechanical properties and microstructure of PM Ti₂AlNb alloy prepared via hot isostatic pressing[J]. Chinese Journal of Materials Research, 2019, 33（3）: 161-169. doi: 10.11901/1005.3093.2018.509
[2]	王子彧, 陈志勇, 王新, 等. Ti₂AlNb薄板的织构及其对拉伸性能各向异性的影响[J]. 金属学报, 2025, 61(11): 1625-1637. Wang Ziyu, Chen Zhiyong, Wang Xin, et al. Texture of Ti₂AlNb sheet and its effect on anisotropy of tensile properties[J]. Acta Metallurgica Sinica, 2025, 61(11): 1625-1637. doi: 10.11900/0412.1961.2024.00074 Wang Ziyu, Chen Zhiyong, Wang Xin, et al. Texture of Ti₂AlNb sheet and its effect on anisotropy of tensile properties[J]. Acta Metallurgica Sinica, 2025, 61（11）: 1625-1637. doi: 10.11900/0412.1961.2024.00074
[3]	王一迪, 王鹏程, 刘晓飞, 等. 粉末冶金态Ti₂AlNb合金电子束焊接头组织性能及裂纹产生机制研究[J/OL]. 金属学报: 1-12[2026-01-27]. https://link.cnki.net/urlid/21.1139.TG.20250701.1451.022. Wang Yidi, Wang Pengcheng, Liu Xiaofei, et al. Microstructure, mechanical property, and crack formation mechanism in electron beam welded joints of powder metallurgy Ti₂AlNb alloy[J/OL]. Acta Metallurgica Sinica: 1-12[2026-01-27]. https://link.cnki.net/urlid/21.1139.TG.20250701.1451.022. Wang Yidi, Wang Pengcheng, Liu Xiaofei, et al. Microstructure, mechanical property, and crack formation mechanism in electron beam welded joints of powder metallurgy Ti₂AlNb alloy[J/OL]. Acta Metallurgica Sinica: 1-12[2026-01-27]. https://link.cnki.net/urlid/21.1139.TG.20250701.1451.022.
[4]	王清江, 刘建荣, 杨锐. 高温钛合金的现状与前景[J]. 航空材料学报, 2014, 34(4): 1-26. Wang Qingjiang, Liu Jianrong, Yang Rui. High-temperature titanium alloys: status and perspective[J]. Journal of Aeronautical Materials, 2014, 34(4): 1-26. doi: 10.11868/j.issn.1005-5053.2014.4.001 Wang Qingjiang, Liu Jianrong, Yang Rui. High-temperature titanium alloys: status and perspective[J]. Journal of Aeronautical Materials, 2014, 34（4）: 1-26. doi: 10.11868/j.issn.1005-5053.2014.4.001
[5]	刘石双, 曹京霞, 周毅, 等. Ti₂AlNb合金研究与展望[J]. 中国有色金属学报, 2021, 31(11): 3106-3126. Liu Shishuang, Cao Jingxia, Zhou Yi, et al. Research and prospect of Ti₂AlNb alloy[J]. The Chinese Journal of Nonferrous Metals, 2021, 31(11): 3106-3126. doi: 10.11817/j.ysxb.1004.0609.2021-42420 Liu Shishuang, Cao Jingxia, Zhou Yi, et al. Research and prospect of Ti₂AlNb alloy[J]. The Chinese Journal of Nonferrous Metals, 2021, 31（11）: 3106-3126. doi: 10.11817/j.ysxb.1004.0609.2021-42420
[6]	冯艾寒, 李渤渤, 沈军. Ti₂AlNb基合金的研究进展[J]. 材料与冶金学报, 2011, 10(1): 30-38. Feng Aihan, Li Bobo, Shen Jun. Recent advances on Ti₂AlNb-based alloys[J]. Journal of Materials and Metallurgy, 2011, 10(1): 30-38. doi: 10.3969/j.issn.1671-6620.2011.01.007 Feng Aihan, Li Bobo, Shen Jun. Recent advances on Ti₂AlNb-based alloys[J]. Journal of Materials and Metallurgy, 2011, 10（1）: 30-38. doi: 10.3969/j.issn.1671-6620.2011.01.007
[7]	杜刚, 崔林林, 雷强, 等. O相合金Ti₂AlNb的研究进展[J]. 中国材料进展, 2018, 37(1): 68-73. Du Gang, Cui Linlin, Lei Qiang, et al. Research and development of orthorhombic titanium aluminide[J]. Materials China, 2018, 37(1): 68-73. doi: 10.7502/j.issn.1674-3962.2018.01.10 Du Gang, Cui Linlin, Lei Qiang, et al. Research and development of orthorhombic titanium aluminide[J]. Materials China, 2018, 37（1）: 68-73. doi: 10.7502/j.issn.1674-3962.2018.01.10
[8]	杜思敏, 李雄, 林发驹. 热处理工艺对Cr12MoV钢组织及硬度的影响[J]. 钢铁钒钛, 2021, 42(3): 148-154. Du Simin, Li Xiong, Lin Faju. Effect of heat treatment process on microstructure and hardness of Cr12MoV steel[J]. Iron Steel Vanadium Titanium, 2021, 42(3): 148-154. doi: 10.7513/j.issn.1004-7638.2021.03.023 Du Simin, Li Xiong, Lin Faju. Effect of heat treatment process on microstructure and hardness of Cr12MoV steel[J]. Iron Steel Vanadium Titanium, 2021, 42（3）: 148-154. doi: 10.7513/j.issn.1004-7638.2021.03.023
[9]	范玉婷, 彭力, 李京懋, 等. 不同热处理温度对TA16棒材显微组织和力学性能的影响[J]. 钢铁钒钛, 2025, 46(3): 53-59. Fan Yuting, Peng Li, Li Jingmao, et al. Microstructure and mechanical properties of TA16 bar with different heat treatment temperatures[J]. Iron Steel Vanadium Titanium, 2025, 46(3): 53-59. doi: 10.7513/j.issn.1004-7638.2025.03.009 Fan Yuting, Peng Li, Li Jingmao, et al. Microstructure and mechanical properties of TA16 bar with different heat treatment temperatures[J]. Iron Steel Vanadium Titanium, 2025, 46（3）: 53-59. doi: 10.7513/j.issn.1004-7638.2025.03.009
[10]	姚小凤, 亓海全, 谢盈盈, 等. 22MnB5钢亚温区加热淬火组织与力学性能的影响[J]. 钢铁钒钛, 2025, 46(6): 164-171. Yao Xiaofeng, Qi Haiquan, Xie Yingying, et al. The influence of sub-temperature heating on the quenching microstructure and mechanical properties of 22MnB5 steel[J]. Iron Steel Vanadium Titanium, 2025, 46(6): 164-171. doi: 10.7513/j.issn.1004-7638.2025.06.020 Yao Xiaofeng, Qi Haiquan, Xie Yingying, et al. The influence of sub-temperature heating on the quenching microstructure and mechanical properties of 22MnB5 steel[J]. Iron Steel Vanadium Titanium, 2025, 46（6）: 164-171. doi: 10.7513/j.issn.1004-7638.2025.06.020
[11]	霍俊美, 何博. Ti₂AlNb基合金及其增材制造技术研究进展[J]. 中国材料进展, 2022, 41(8): 645-652. Huo Junmei, He Bo. Research progress of Ti₂AlNb-based alloy and its additive manufacturing technology[J]. Materials China, 2022, 41(8): 645-652. doi: 10.7502/j.issn.1674-3962.202101011 Huo Junmei, He Bo. Research progress of Ti₂AlNb-based alloy and its additive manufacturing technology[J]. Materials China, 2022, 41（8）: 645-652. doi: 10.7502/j.issn.1674-3962.202101011
[12]	梁弼宁, 曹烁, 王慈, 等. 高温钛合金中合金原子在α₂相中占位选择的第一性原理研究[J/OL]. 金属学报: 1-18[2026-01-27]. https://link.cnki.net/urlid/21.1139.TG.20250826.1617.008. Liang Bining, Cao Shuo, Wang Ci, et al. Site occupation of alloying elements in α₂ phase in high-temperature titanium alloys: a first-principles study[J/OL]. Acta Metallurgica Sinica: 1-18[2026-01-27]. https://link.cnki.net/urlid/21.1139.TG.20250826.1617.008. Liang Bining, Cao Shuo, Wang Ci, et al. Site occupation of alloying elements in α₂ phase in high-temperature titanium alloys: a first-principles study[J/OL]. Acta Metallurgica Sinica: 1-18[2026-01-27]. https://link.cnki.net/urlid/21.1139.TG.20250826.1617.008.
[13]	薛晨, 曾卫东, 王伟, 等. 第二相颗粒对Ti-22Al-25Nb合金中B2晶粒长大的抑制作用[J]. 中国有色金属学报, 2013, 23(S1): S72-S74. Xue Chen, Zeng Weidong, Wang Wei, et al. Pinning effect of second-phase particles on B2 grain growth of Ti-22Al-25Nb alloy[J]. The Chinese Journal of Nonferrous Metals, 2013, 23(S1): S72-S74. Xue Chen, Zeng Weidong, Wang Wei, et al. Pinning effect of second-phase particles on B2 grain growth of Ti-22Al-25Nb alloy[J]. The Chinese Journal of Nonferrous Metals, 2013, 23（S1）: S72-S74.
[14]	刘泽栋, 杨劼人, 陈瑞润, 等. Ti₂AlNb基金属间化合物: 研究进展、挑战及展望[J]. 中国有色金属学报, 2023, 33(12): 4039-4058. Liu Zedong, Yang Jieren, Chen Ruirun, et al. Ti₂AlNb-based intermetallic compounds: research progress, challenges, and prospects[J]. The Chinese Journal of Nonferrous Metals, 2023, 33(12): 4039-4058. doi: 10.11817/j.ysxb.1004.0609.2023-44351 Liu Zedong, Yang Jieren, Chen Ruirun, et al. Ti₂AlNb-based intermetallic compounds: research progress, challenges, and prospects[J]. The Chinese Journal of Nonferrous Metals, 2023, 33（12）: 4039-4058. doi: 10.11817/j.ysxb.1004.0609.2023-44351
[15]	李楠. Ti-22Al-24Nb-0.5Mo合金组织设计与变形行为研究[D]. 合肥: 中国科学技术大学, 2023. Li Nan. Microstructure design and deformation behavior of Ti-22Al-24Nb-0.5Mo alloy[D]. Hefei: University of Science and Technology of China, 2023. Li Nan. Microstructure design and deformation behavior of Ti-22Al-24Nb-0.5Mo alloy[D]. Hefei: University of Science and Technology of China, 2023.
[16]	金淼, 李文权, 郝硕, 等. 固溶温度对Mn-N型双相不锈钢拉伸变形行为的影响[J]. 金属学报, 2019, 55(4): 436-444. Jin Miao, Li Wenquan, Hao Shuo, et al. Effect of solution temperature on tensile deformation behavior of Mn-N-bearing duplex stainless steel[J]. Acta Metallurgica Sinica, 2019, 55(4): 436-444. doi: 10.11900/0412.1961.2018.00276 Jin Miao, Li Wenquan, Hao Shuo, et al. Effect of solution temperature on tensile deformation behavior of Mn-N-bearing duplex stainless steel[J]. Acta Metallurgica Sinica, 2019, 55（4）: 436-444. doi: 10.11900/0412.1961.2018.00276
[17]	刘智恩. 材料科学基础[M]. 第5版. 西安: 西北工业大学出版社, 2019. Liu Zhien. Fundamentals of materials science[M]. 5th ed. Xi'an: Northwestern Polytechnical University Press, 2019. Liu Zhien. Fundamentals of materials science[M]. 5th ed. Xi'an: Northwestern Polytechnical University Press, 2019.
[18]	Baker I. Recovery, recrystallization and grain growth in ordered alloys[J]. Intermetallics, 2000, 8(9-11): 1183-1196. doi: 10.1016/S0966-9795(00)00031-5
[19]	Sun Shichen, Fang Hongze, Hao Jiaqi, et al. Formation behavior of subcrystals and its strengthening and toughening mechanism by coupling with α phase in titanium alloys during forging at various temperatures[J]. Journal of Materials Processing Technology, 2025, 336: 118705. doi: 10.1016/j.jmatprotec.2024.118705
[20]	Zhao Yanan, Ma Zongqing, Yu Liming, et al. The simultaneous improvements of strength and ductility in additive manufactured Ni-based superalloy via controlling cellular subgrain microstructure[J]. Journal of Materials Science & Technology, 2021, 68: 184-190. doi: 10.1016/j.jmst.2020.07.011
[21]	赵子博, 王清江, 刘建荣, 等. 两种可用于描述晶粒变形传递倾向性的物理量: 滑移位向差和孪生取向差[J]. 聊城大学学报(自然科学版), 2025, 38(5): 703-706. Zhao Zibo, Wang Qingjiang, Liu Jianrong, et al. Two physical quantities to describe the tendency of grain deformation transfer: slip misorientation and twinning misorientation[J]. Journal of Liaocheng University (Natural Science Edition), 2025, 38(5): 703-706. doi: 10.19728/j.issn1672-6634.2025050011 Zhao Zibo, Wang Qingjiang, Liu Jianrong, et al. Two physical quantities to describe the tendency of grain deformation transfer: slip misorientation and twinning misorientation[J]. Journal of Liaocheng University (Natural Science Edition), 2025, 38（5）: 703-706. doi: 10.19728/j.issn1672-6634.2025050011