TC4钛合金盘锻件显微组织和高温拉伸性能均匀性研究

王影; 李楠; 彭文雅; 于帅; 刘建荣; 郭海龙; 王清江

doi:10.7513/j.issn.1004-7638.2026.01.007

TC4钛合金盘锻件显微组织和高温拉伸性能均匀性研究

doi: 10.7513/j.issn.1004-7638.2026.01.007

王影^1,,
李楠^2, ,,
彭文雅¹,
于帅^{2, 3},
刘建荣²,
郭海龙¹,
王清江²

1.
中国航发湖南动力机械研究所, 湖南株洲 412002
2.
中国科学院金属研究所, 辽宁沈阳 110016
3.
中国科学技术大学材料科学与工程学院, 辽宁沈阳 110016

详细信息

作者简介:
王影，1995年出生，女，黑龙江大庆人，工程师，硕士，从事材料与工艺评价及应用等研究，E-mail：631077272@qq.com

通讯作者:
李楠，1991年出生，女，辽宁沈阳人，博士，从事高温钛合金组织与性能优化研究，E-mail：nli@imr.ac.cn

中图分类号: TF044
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出版历程
- 收稿日期: 2025-10-30
- 录用日期: 2025-12-18
- 修回日期: 2025-12-03
- 网络出版日期: 2026-02-28
- 刊出日期: 2026-02-28

Microstructural homogeneity and high-temperature tensile uniformity of TC4 alloy disk forgings

1.
Hunan Aviation Powerplant Research Institute, Aero Engine Corporation of China, Zhuzhou 412002, Hunan, China
2.
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China
3.
School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, Liaoning, China

摘要

摘要: 采用模锻成形与固溶时效处理制备了TC4钛合金盘锻件，系统研究了盘锻件不同位置的显微组织特征以及对应的高温拉伸性能。结果表明，盘件沿径向存在一定的高温强度差异：其中轮缘区域强度最高，距轮心1/2R区域（R为半径）最低，而不同位置的塑性差异较小。显微组织与断口形貌分析表明，显微组织和织构差异是造成高温强度存在差异的主要原因。轮缘与轮心区域具有细小、均匀分布的板条状α相，能有效缩短位错运动的平均自由程，从而在提高强度的同时保持良好的塑性。然而，1/2R区域的α相主要呈现出粗大的集束状，导致强度与塑性下降。
- TC4钛合金 /
- 盘锻件 /
- 显微组织 /
- 高温拉伸性能
Abstract: A TC4 titanium alloy disk was fabricated via die forging followed by solution and aging heat treatment. The microstructure and corresponding high temperature tensile properties were systematically investigated across three representative regions. The results reveal significant radial non-uniformity in high temperature tensile properties, the rim region exhibits the highest strength, the 1/2R region appears the lowest, while ductility shows little difference among the three regions. Microstructure, texture and fracture surface analyses indicate that the non-uniformity in high temperature tensile properties originates from variations in the morphology and texture of α phase. The rim and hub regions contain fine secondary α phase with basket-weave morphology, which effectively suppresses dislocation motion and void coalescence, thereby enhancing strength without compromising ductility. In contrast, the 1/2R region contains coarser secondary α phase with a colony-like morphology, promoting localized void growth and early fracture. In addition, due to the high Schmidt factor of the basal slip of the α phase in the 1/2R region, the tensile strength is reduced.
- TC4 titanium alloy /
- disk forging /
- microstructure /
- high temperature tensile properties

HTML全文

图 1 TC4钛合金盘锻件样品及拉伸测试取样示意

(a) 盘锻件形貌; (b)拉伸测试取样示意; (c)低倍组织形貌

Figure 1. TC4 titanium alloy disk forging sample and schematic illustration of tensile test sampling

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图 2 TC4钛合金盘锻件不同位置处100、200 ℃和300 ℃拉伸应力-应变曲线

Figure 2. Comparison of tensile stress-strain behaviors at elevated temperatures (100, 200 ℃ and 300 ℃) at different locations of the TC4 titanium alloy disk forging

(a) 100 ℃; (b) 200 ℃; (c) 300 ℃

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图 3 TC4钛合金盘锻件不同位置处100、200 ℃和300 ℃拉伸强度

Figure 3. Tensile strength at elevated temperatures (100, 200 ℃ and 300 ℃) at different locations of the TC4 titanium alloy disk forging

(a) 100 ℃; (b) 200 ℃; (c) 300 ℃

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图 4 TC4钛合金盘锻件不同位置处100、200 ℃和300 ℃拉伸塑性

Figure 4. Tensile ductility at elevated temperatures (100, 200 ℃ and 300 ℃) at different locations of the TC4 titanium alloy disk forging

(a) 100 ℃; (b) 200 ℃; (c) 300 ℃

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图 5 高倍组织取样位置

Figure 5. Sampling locations for microstructure observations of the TC4 titanium alloy disk forging

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图 6 TC4钛合金盘锻件不同位置金相组织

(a) 位置1; (b) 位置2; (c) 位置3; (d) 位置4; (e) 位置5

Figure 6. Microstructures at different locations of the TC4 titanium alloy disk forging

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图 7 TC4钛合金盘锻件不同位置{0002}极图

(a) 位置1; (b) 位置2; (c) 位置3; (d) 位置4; (e) 位置5

Figure 7. {0002} pole figures at different locations of the TC4 titanium alloy disk forging

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图 8 TC4钛合金盘锻件不同位置Schmidt因子分布

(a)(b)(c) 轮缘位置Schmidt因子分布；(d)(e)(f) 1/2R位置Schmidt因子分布；(g)(h)(i) 轮心位置Schmidt因子分布；(a)(d)(g) 基面Schmidt因子分布; (b)(e)(h) 柱面Schmidt因子分布位置; (c)(f)(h) Schmidt因子分布频率

Figure 8. Schmidt factor maps at different locations of the TC4 titanium alloy disk forging

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图 9 TC4钛合金盘锻件轮心区域不同温度的拉伸断口形貌

Figure 9. Tensile fracture morphologies of the hub region in the TC4 alloy disk forging at different temperatures

(a1) (a2) 100 ℃; (b1) (b2) 300 ℃

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图 10 TC4钛合金盘锻件轮心区域不同温度的拉伸断口尖端显微组织

Figure 10. Microstructures at tensile fracture tips of the hub region in the TC4 alloy disk forging at different temperatures

(a1) (a2) 100 ℃; (b1) (b2) 300 ℃

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图 11 TC4钛合金盘锻件不同区域200 ℃拉伸断口形貌

(a1) (a2) 轮缘; (b1) (b2) 1/2R ; (c1) (c2) 轮心

Figure 11. Tensile fracture morphologies of the different regions in the TC4 alloy disk forging at 200 ℃

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图 12 TC4钛合金盘锻件不同区域200 ℃拉伸断口尖端显微组织

(a1) (a2) 轮缘; (b1) (b2) 1/2R ; (c1) (c2) 轮心

Figure 12. Microstructures at tensile fracture tips of the different regions in the TC4 alloy disk forging at 200 ℃

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表 1 TC4钛合金盘锻件不同位置初生α相的含量、尺寸和次生α相板条厚度

Table 1. Volume fraction, size of primary α phase and thickness of secondary α phase laths at different locations of the TC4 titanium alloy disk forging

Number	Locations	Volume fraction primary α phase/%	Size primary α phase /μm	Thickness of secondary α phase laths /μm
1	Rim	27.84	16.92	0.52
2	1/2R	34.67	18.86	1.85
3	1/2R	34.91	19.27	1.96
4	1/2R	28.46	17.15	0.60
5	Center	30.93	17.72	0.71

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