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Al-Fe-Cr-Ti合金等温锻造微观组织与力学性能研究

发表时间:2017-03-31  浏览量:1324  下载量:177
全部作者: 吴静,冯艾寒,沈军
作者单位: 哈尔滨工业大学材料科学与工程学院;伯明翰大学材料与冶金学院;同济大学材料科学与工程学院
摘 要: 铝合金具有轻质高强的优点,因此在交通运输业及航空行业有着广泛的应用。其中快速凝固−粉末冶金法制备的Al-Fe-Cr-Ti合金因在高温下具有较高的机械强度和足够的抗氧化性而被广泛研究。研究Al-Fe-Cr-Ti合金在等温锻造过程中微观组织及力学性能的变化。结果表明,Al-Fe-Cr-Ti合金在不同应变速率及变形温度条件下等温锻造的微观组织仅有微小变化。室温下等温锻造样品的抗拉强度对等温锻造变形温度较为敏感,随着等温锻造变形温度的升高,合金抗拉强度逐渐降低;300℃时的抗拉强度对等温锻造变形温度不敏感,在280 MPa附近浮动。
关 键 词: 金属材料;等温锻造;Al-Fe-Cr-Ti合金;微观组织;力学性能
Title: Study on microstructure and mechanical properties of Al-Fe-Cr-Ti alloys during isothermal forging
Author: WU Jing, FENG Aihan, SHEN Jun
Organization: School of Materials Science and Engineering, Harbin Institute of Technology; Department of Metallurgy and Materials, University of Birmingham; School of Materials Science and Engineering, Tongji University
Abstract: Aluminum alloys have wide applications in the automotive and aerospace industries due to their high strength and light weight. Al-Fe-Cr-Ti alloys, which are commonly prepared by rapid solidification and powder metallurgy, have been widely studied due to their great mechanical properties and oxidation resistance at elevated temperatures. The current work investigates the microstructure and mechanical properties of Al-Fe-Cr-Ti alloys during isothermal forging. The results suggest that the alloys after isothermal forging have similar microstructures at all processing parameters. The ultimate tensile stress of alloys at room temperature is sensitive to the isothermal forging deformation temperatures, and decreases when isothermal forging deformation temperature increases. When the tensile tests are performed at 300℃, the ultimate tensile stress of the alloys is not sensitiveto the isothermal forging deformation temperatures, which is about 280 MPa.
Key words: metallic materials; isothermal forging; Al-Fe-Cr-Ti alloys; microstructure; mechanical properties
发表期数: 2017年3月第6期
引用格式: 吴静,冯艾寒,沈军. Al-Fe-Cr-Ti合金等温锻造微观组织与力学性能研究[J]. 中国科技论文在线精品论文,2017,10(6):635-641.
 
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