| Ti-4.5Al-3V-2Fe-2Mo合金板材超塑成形组织及性能研究 |
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| 引用本文： | 付明杰,曾元松,韩秀全,吕凤工,王富鑫.Ti-4.5Al-3V-2Fe-2Mo合金板材超塑成形组织及性能研究[J].航空制造技术,2021(1). |
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| 作者姓名： | 付明杰 曾元松 韩秀全 吕凤工 王富鑫 |
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| 作者单位： | 中国航空制造技术研究院;塑性成形技术航空科技重点实验室;数字化塑性成形技术与装备北京市重点实验室 |
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| 基金项目： | 万人计划项目(2069999)。 |
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| 摘 要： | 分别采用最大m值法和恒应变速率法对Ti-4.5Al-3V-2Fe-2Mo合金(SP700钛合金)板材进行超塑拉伸,研究了755~785℃、0.1~0.005s-1及不同方向的单向条件下其超塑拉伸变形行为和典型件的超塑成形行为及力学性能。结果表明:SP700钛合金具有优异的低温超塑性,采用最大m值法在45°方向、775℃变形后,获得3110%的最高延伸率,变形诱发晶粒长大使SP700钛合金抵抗颈缩的能力增加。受双向拉应力作用的锥形件,在755℃具有最优的超塑成形工艺性,锥形件高度可达到100mm,并且晶粒尺寸无明显变化。经33%超塑变形量的试样室温力学性能略高于无变形试样,其室温抗拉强度和延伸率平均值分别达到1027MPa和16.8%。
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| 关 键 词： | SP700钛合金 板材 超塑性 显微组织 力学性能 |
Microstructure and Mechanical Property of Superplastic Deformed Ti-4.5Al-3V-2Fe-2Mo Alloy Sheet |
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| FU Mingjie,ZENG Yuansong,HAN Xiuquan,Lü Fenggong,WANG Fuxin.Microstructure and Mechanical Property of Superplastic Deformed Ti-4.5Al-3V-2Fe-2Mo Alloy Sheet[J].Aeronautical Manufacturing Technology,2021(1). |
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| Authors: | FU Mingjie ZENG Yuansong HAN Xiuquan LÜ Fenggong WANG Fuxin |
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| Affiliation: | (AVIC Manufacturing Technology Institute,Beijing 100024,China;Aeronautical Key Laboratory for Plastic Forming Technology,Beijing 100024,China;Key Laboratory of Digital Plasticity Forming Technology and Equipment,Beijing 100024,China) |
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| Abstract: | The superplasticity of Ti-4.5Al-3V-2Fe-2Mo alloy(SP700 alloy)was studied by the methods of maxium m value and constant rate under the conditions of 755~785℃,0.1~0.005s-1 and different tensile axis direction.Typical parts were formed and RT properties after superplastic forming were evaluated.The results showed SP700 alloy has excellent low temperature superplasticity with 3110%elongation at 775℃and 45°direction with max m value tensile method.The capacity of anti-neck-shrink increased due to strain induced grains growing.The cone shape part formed at 755℃with the highest height of 100mm under bidirectional pull stress condition,and microstructure has no significant change.RT properties of the sample with 33%deformation are 1027MPa ultrastrength and 16.8%elongation,which are little higher than those of undeformed specimens. |
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| Keywords: | SP700 titanium alloy Sheet Superplasticity Microstructure Mechanical property |
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