室温轧制和退火对 (CrCoNi)96V4 中等熵合金微观结构和机械性能的影响

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics Pub Date : 2024-08-29 DOI:10.1016/j.intermet.2024.108468

Jinliang Chen , Qi Lai , Xiguang Zhao , Jianhong Yi , Qiang Li

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引用次数: 0

摘要

采用真空电弧熔炼法制备了铸态（铬钴镍）96V4中熵合金（MEA）。然后分别在 700 ℃、800 ℃ 和 900 ℃ 下退火 30 分钟。结果表明，退火后 MEA 的强度和延展性得到了很好的平衡。在 900 °C/30 分钟退火后，MEA 的屈服强度和拉伸强度分别为 678 兆帕和 1024 兆帕，伸长率保持在 26%。退火后，MEA 中形成了大量的退火孪晶，这使得 MEA 的强度和延展性显著提高。同时，在 MEA 中发现了富铬颗粒，这对提高合金的强度和延展性有积极作用。

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Effect of room temperature rolling and annealing on microstructure and mechanical properties of (CrCoNi)96V4 medium entropy alloy

As cast (CrCoNi)₉₆V₄ medium entropy alloy（MEA）was prepared by vacuum arc melting. The MEA is deformed by rolling at room temperature with a total deformation of 67 %, The yield strength and tensile strength of the deformed MEA are 1297 MPa and 1410 MPa respectively, the elongation of the alloy is only 8 %.Then the deformed MEA was annealed for 30min at 700 °C, 800 °C and 900 °C respectively. The results show that the strength and ductility of the MEA after annealing were well balanced. The yield strength and tensile strength of the MEA after annealing at 900 °C/30 min are 678 MPa and 1024 MPa, and the elongation is maintained at 26 %. After annealing, a large number of annealing twins were formed in the MEA, which makes the strength and ductility of the MEA significantly improved. At the same time, Cr-rich particles were found in the MEA, which had positive effect on the improvement of the strength and ductility of the alloy.

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来源期刊

Intermetallics 工程技术-材料科学：综合

CiteScore

7.80

自引率

9.10%

发文量

291

审稿时长

37 days

期刊介绍： This journal is a platform for publishing innovative research and overviews for advancing our understanding of the structure, property, and functionality of complex metallic alloys, including intermetallics, metallic glasses, and high entropy alloys. The journal reports the science and engineering of metallic materials in the following aspects: Theories and experiments which address the relationship between property and structure in all length scales. Physical modeling and numerical simulations which provide a comprehensive understanding of experimental observations. Stimulated methodologies to characterize the structure and chemistry of materials that correlate the properties. Technological applications resulting from the understanding of property-structure relationship in materials. Novel and cutting-edge results warranting rapid communication. The journal also publishes special issues on selected topics and overviews by invitation only.