难熔高熵合金性能调控与增材制造
Property tuning and additive manufacturing of refractory high-entropy alloys
查看参考文献104篇
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文摘
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难熔高熵合金(refractory high-entropy alloys,RHEAs)通过添加多种难熔元素形成等原子比或近等原子比的多主元合金,具有简单的相结构和优异的高温性能,在高温合金领域具有极为广阔的应用前景。本文以难熔高熵合金的性能特点与制备工艺为基础,从合金制备与成形面临的挑战出发,综述了难熔高熵合金的性能调控方法与研究进展,介绍了增材制造难熔高熵合金实现的突破与面临的困境,对难熔高熵合金的成分设计及优化、材料制备与加工、增材制造成形进行了展望,并对其未来重点研究方向提出了如下建议:通过调控相结构和相界面克服难熔高熵合金的强韧制约;结合传统强韧化理论与难熔高熵合金自身性能特点进行材料设计;借助增材制造技术的工艺特征促进难熔高熵合金的形性调控;探究难熔高熵合金在高温及多场耦合环境下的使役性能与失效机制。 |
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其他语种文摘
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The refractory high-entropy alloys(RHEAs)usually form a multi-principal elements alloy with equal atomic ratio or near equal atomic ratio viaadding a variety of high melting point elements, showing simple phase composition and excellent high temperature properties,and processing a broad application prospect in the field of superalloy.Based on the performance characteristics and preparation process of RHEAs,and from the perspective of the current situation and challenges in fabrication and forming,the property tuning methods and its research progress of RHEAs were summarized,as well as the achieved breakthrough and the facing dilemma of the additive manufactured RHEAs. A prospection on the composition design and optimization, material preparation and processing,and additive manufactured forming of RHEAs was also proposed.The following suggestions are put forward for the key research trend of RHEAs in the future:tuning phase composition and phases interface to overcome the strength-ductility trade-off of RHEAs, designing alloys by combining the mature traditional strengthening and toughening theory with the properties of RHEAs,modifying the formability and properties of RHEAs by drawing support from the processing characteristics of additive manufacturing technology,and investigating the servicing performance and failure mechanism in high temperature or multi-field coupling condition of RHEAs. |
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来源
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材料工程
,2020,48(10):1-16 【核心库】
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DOI
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10.11868/j.issn.1001-4381.2020.000281
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关键词
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难熔高熵合金
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性能调控
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增材制造
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地址
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东南大学材料科学与工程学院, 南京, 211189
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军事科学院国防科技创新研究院, 北京, 100071
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(徐州)中国矿业大学化工学院, 江苏, 徐州, 221116
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1001-4381 |
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学科
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金属学与金属工艺 |
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基金
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国家重点研发计划项目
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国家自然科学基金资助项目
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文献收藏号
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CSCD:6839796
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