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| 高压热处理对TC11钛合金组织及力学性能的影响 |
| Effect of High-pressure Heat Treatment on Microstructure and Mechanical Properties of TC11 Titanium Alloy |
| Received:June 01, 2023 |
| DOI：10.3969/j.issn.1674-6457.2023.09.001 |
| 中文关键词: TC11钛合金 高压热处理 微观组织 硬度 抗压强度 |
| 英文关键词: TC11 titanium alloy high-pressure heat treatment microstructure hardness compressive strength |
| 基金项目:山西自然科学基金(202103021224215);山西省青年自然科学基金(20210302124102);中国博士后科学基金(2022M713872);常州大学石油化工表面工程与先进材料重点实验室基金(21SEM004);内蒙古自治区科研项目(2022YFDZ0005);中央引导地方科技发展专项资金(YDZJTSX2021A027);中北大学青年学术带头人资助(11045505) |
| Author Name | Affiliation | | MIAO Fang | College of Materials Science and Engineering, North University of China, Taiyuan 030051, China | | WU Hui-yun | College of Materials Science and Engineering, North University of China, Taiyuan 030051, China | | LU Ze | College of Materials Science and Engineering, North University of China, Taiyuan 030051, China | | ZHANG Meng-fei | College of Materials Science and Engineering, North University of China, Taiyuan 030051, China | | GU Tao | College of Materials Science and Engineering, North University of China, Taiyuan 030051, China | | LIU Jian-hua | Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Hebei Qinhuangdao 066004, China | | LU Ruo-peng | College of Materials Science and Engineering, North University of China, Taiyuan 030051, China | | YAN Zhi-jie | College of Materials Science and Engineering, North University of China, Taiyuan 030051, China |
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| 中文摘要: |
| 目的 为提高TC11钛合金的力学性能，对TC11钛合金进行了高压热处理实验研究，并分析了高压热处理对TC11钛合金组织及力学性能的影响规律。方法 采用六面顶压机对退火态的TC11钛合金试样进行高压热处理实验，高压热处理工艺流程如下:分别在1、3、5 GPa压力下，将原始态TC11钛合金试样加热至1 000 ℃，保温20 min后冷却，然后对高压处理后的试样进行微观组织分析。利用X射线衍射仪(XRD)分析试样物相组成，利用场发射电子显微镜(SEM)分析微观组织形貌和断口形貌，利用透射电子显微镜(TEM)观察试样相形貌和位错密度。通过纳米压痕实验机、维氏硬度计、力学实验机等，测试经过处理的钛合金的室温硬度和力学性能。利用热模拟实验测试TC11钛合金试样400 ℃时的压缩强度。结果 高压热处理有效提高了TC11钛合金试样的塑性变形抗力、硬度和抗压强度。TC11钛合金在3 GPa高压热处理工艺下的室温硬度、室温抗压强度和400 ℃抗压强度分别为378HV、1 610 MPa和1 442 MPa，与相同工艺的常压热处理相比，分别提高了12.84%、9.89%、8.58%。结论 高压热处理可细化TC11钛合金微观组织，提高基体的位错密度，从而有效提升了TC11钛合金的综合力学性能。 |
| 英文摘要: |
| The work aims to study the TC11 titanium alloy by high-pressure heat treatment and analyze the effect of high-pressure treatment on the microstructure and mechanical properties of TC11 titanium alloy, so as to improve the mechanical properties of TC11 titanium alloy. In the experiment, the annealed TC11 titanium alloy were subject to heat treatment at 1 000 ℃ and held for 20 min under high pressures of 1, 3, and 5 GPa with CS-IB type six-anvil high-pressure equipment, and then cooled to room temperature. Then the microstructure of the alloy after high-pressure heat treatment was analyzed. The phase composition of the TC11 titanium alloy sample was analyzed with an X-ray diffraction (XRD), and the microstructure and fracture morphology was analyzed with a field emission electron microscopy (SEM). Moreover, the phase morphology and dislocation density of the TC11 titanium sample was observed with a transmission electron microscopy (TEM). The room temperature hardness and mechanical properties of the treated experimental samples were tested with nanoindentation, Vickers hardness, and mechanical testing machines. The compressive strength at high temperature (400 ℃) was measured by a thermal simulation testing machine. The high-pressure heat treatment effectively improved the plastic deformation resistance, hardness and compressive mechanical properties of the TC11 titanium alloy sample. The hardness and compressive strength at room temperature and the compressive strength at 400 ℃ of TC11 titanium alloy under 3 GPa high-pressure heat treatment were 378HV, 1 610 MPa, and 1 442 MPa, which were increased by 12.84%, 9.89% and 8.58% compared with those after atmospheric pressure heat treatment with the same process. The high-pressure heat treatment can obtain fine structure and increase the dislocation density, which effectively improve the integrated mechanical properties of the TC11 titanium alloy. |
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