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有色金属工程:2024,(10)
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碳元素对L12型高熵化合物合金组织及性能的影响
祖润锋, 杜兴蒿, 袁帅, 杨明澄, 段国升, 武保林, 张利
(沈阳航空航天大学 材料科学与工程学院)
Effects on the microstructure and mechanical properties of a L12-type high-entropy intermetallic alloy dopped with carbon
ZuRunfeng, DuXinghao, YuanShuai, YangMingcheng, DuanGuosheng, WuBaolin, ZhangLi
(Shenyang Aerospace University)
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本文已被:浏览 67次   下载 24
投稿时间:2024-03-24    修订日期:2024-04-07
中文摘要: 在外加载荷作用下,L12型有序化合物合金易出现晶界脆性断裂,严重制约了其实用化进程。本文研究了碳元素对(Ni, Co, Fe)3(Al, Ti, Fe)型有序高熵化合物合金的组织以及性能的影响。结果表明,经室温变形以及高温退火处理后,含碳合金具有不完全再结晶组织,并且在晶界处存在无序面心立方结构的纳米过渡层。该含碳合金在室温下屈服强度达到1015MPa, 拉伸延伸率达到16%;在760℃条件下屈服强度达到900MPa, 拉伸延伸率达到10%。说明碳的加入有助于L12型化合物合金克服晶界脆性,获得良好的综合力学性能。
Abstract:It is known that L12-type ordered intermetallic alloys are generally susceptible to brittle fracture at grain boundaries under the loading conditions, which seriously limits their practical usability. In this work, the effects of doping C on the microstructure and mechanical properties of (Ni, Co, Fe)3(Al, Ti, Fe) high-entropy intermetallic alloys have been investigated. After deforming at room temperature and annealing at elevated temperature, the C-dopped alloy displayed a non-fully recrystallized structure in which disordered face-centered cubic structure (f.c.c.) nanolayers can be observed at the grain boundaries. The C-dopped alloy displayed yield tensile strength of 1015 MPa, 900MPa combined with a tensile elongation of 16.0 %, 10% at room temperature and 760℃, respectively. These results have affirmed that the doping of C is conducive to overcome the intergranular embrittlement of L12-type ordered intermetallic alloys, so as to achieve excellent comprehensive mechanical properties.
文章编号:YSJSGC20240180     中图分类号:TG146    文献标志码:
基金项目:辽宁省科技厅军民融合重点项目(2020JH2/107)
引用文本:
祖润锋,杜兴蒿,袁帅,杨明澄,段国升,武保林,张利.碳元素对L12型高熵化合物合金组织及性能的影响[J].有色金属工程,2024,(10):19-24.

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