变形量对TA18钛合金微观组织和性能的影响

霍思含; 吕逍

doi:10.7513/j.issn.1004-7638.2023.04.010

变形量对TA18钛合金微观组织和性能的影响

doi: 10.7513/j.issn.1004-7638.2023.04.010

霍思含,
吕逍

沈阳理工大学材料科学与工程学院, 辽宁沈阳110159

详细信息

作者简介:
霍思含，1998年出生，女，河南周口人，硕士研究生，主要研究方向为钛合金，E-mail：1055011608@qq.com

中图分类号: TF823
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- 被引次数: 0
出版历程
- 收稿日期: 2022-10-17
- 刊出日期: 2023-08-30

Effect of compression deformation on the microstructure and properties of TA18 titanium alloy

Huo Sihan,
Lv Xiao

School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110159, Liaoning, China

摘要

摘要: 针对经精锻和热轧两种工艺加工后的近α型TA18钛合金棒材进行了压缩变形量为10%、 20%、 30%、 50%和70%的压缩试验，之后进行了510 ℃×2 h/AC的退火处理，利用金相显微镜观察并分析了压缩变形量对TA18钛合金微观组织和力学性能的影响。结果表明，经过精锻和热轧后的TA18钛合金棒材分别经过压缩变形量为10%、20%和30%的压缩试验后均可以得到均匀的显微组织，且精锻棒材的力学性能与热轧棒基本一致，在压缩变形量为30%时压缩强度达到最大。退火处理后，压缩后的棒材的晶粒尺寸和分布仍相对均匀，且经过退火处理后的精锻棒材其微观组织更为均匀。
- TA18钛合金 /
- 压缩变形量 /
- 热处理 /
- 微观组织 /
- 力学性能
Abstract: In the present study, the compression experiments with compression deformation of 10%, 20%, 30%, 50% and 70% were carried out for the nearly α type TA18 titanium alloy bars after radial precision forging and hot rolling. The bars were subsequently annealed for 2 hours at 510 ℃. The influence of compression deformation on the microstructure and mechanical properties was investigated by metallographic microscopy. It is found that the radial precision forged and hot rolled TA18 alloy bars can achieve uniform microstructure after compress experiments with compression deformation of 10%, 20%, 30%. The mechanical properties of the alloy bars after radial precision forging and hot rolling keep basically consistent and the compressive strength gets a maximum value at the compression deformation of 30%. The grain size and distribution of the compressed alloy bars are still relatively uniform after annealing at 510 ℃ for 2 hours. After annealing, the microstructure of the compressed radial precision forging bar is more uniform.
- TA18 titanium alloy /
- compression deformation /
- heat treatment /
- microstructure /
- mechanical properties

HTML全文

图 1 不同压缩变形量对精锻态棒材和热轧态棒材室温压缩性能的影响

Figure 1. Effect of different compression rates on the room temperature compressive properties of the radial precision forged (a) and hot rolled (b) bars.

下载: 全尺寸图片幻灯片

图 2 精锻棒(a)和热轧棒(b)进行压缩前的金相显微组织

Figure 2. Optical micrographs of the radial precision forged(a) and hot rolled bars(b) before compression

下载: 全尺寸图片幻灯片

图 3 精锻棒进行压缩后的金相显微组织

Figure 3. Optical micrographs of the radial precision forged bars after compression

(a)压缩变形量10%；(b)压缩变形量20%；(c)压缩变形量30%

下载: 全尺寸图片幻灯片

图 4 精锻棒经压缩后再进行510 ℃×2 h/AC真空退火处理后的金相显微组织

Figure 4. Optical micrographs of the radial precision forged bars after compression and 510 ℃×2 h/AC heat treatment

(a) 压缩变形量10%；(b)压缩变形量20%；(c)压缩变形量30%

下载: 全尺寸图片幻灯片

图 5 热轧棒进行压缩试验后的金相显微组织

Figure 5. Optical micrographs of the hot rolled bars after compression

(a) 压缩变形量10%；(b) 压缩变形量20%；(c) 压缩变形量30%

下载: 全尺寸图片幻灯片

图 6 热轧棒经压缩后再进行510 ℃×2 h/AC真空退火处理后的金相显微组织

Figure 6. Optical micrographs of the hot rolled bars after compression and 510 ℃/2 h heat treatment

(a) 压缩变形量10%；(b)压缩变形量20%；(c)压缩变形量30%

下载: 全尺寸图片幻灯片

表 1 平面应变压缩试验数据

Table 1. Results of plane strain compression experiment

试样编号	加载速率/ (mm·min⁻¹)	压缩强度R_mc/MPa	压缩强度对应的应变量/%
A-10	60	526	9.5
A-20	60	800	19.3
A-30	60	1178	29.4
A-50	60	1813	30
A-70	60	1775	31
B-10	60	574	9.5
B-20	60	799	19.2
B-30	60	1078	29.2
B-50	60	1701	31
B-70	60	1785	30

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