Effect of annealing temperature on the microstructure and mechanical properties of Al0.2CrNbTiV lightweight refractory high-entropy alloy

IF 4.2 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY International Journal of Refractory Metals & Hard Materials Pub Date : 2024-09-24 DOI:10.1016/j.ijrmhm.2024.106903
Liyan Lou , Tianhui Chen , Zhijiang Bi , Wei Wang , Zhihai Cai , Ji Zhou , Ruohui Shuai , Yi Liu , Haidou Wang , Chengxin Li
{"title":"Effect of annealing temperature on the microstructure and mechanical properties of Al0.2CrNbTiV lightweight refractory high-entropy alloy","authors":"Liyan Lou ,&nbsp;Tianhui Chen ,&nbsp;Zhijiang Bi ,&nbsp;Wei Wang ,&nbsp;Zhihai Cai ,&nbsp;Ji Zhou ,&nbsp;Ruohui Shuai ,&nbsp;Yi Liu ,&nbsp;Haidou Wang ,&nbsp;Chengxin Li","doi":"10.1016/j.ijrmhm.2024.106903","DOIUrl":null,"url":null,"abstract":"<div><div>The DSC analysis and heat treatment of the newly proposed Al<sub>0.2</sub>CrNbTiV lightweight refractory high-entropy alloy prepared by vacuum arc melting was investigated, and the evolutions of the microstructure and mechanical properties of the alloy after homogenization annealing at 650 °C, 850 °C and 1050 °C for 12 h were analyzed. The results show that the Al<sub>0.2</sub>CrNbTiV high-entropy alloy could maintain stable BCC solid solution structure from room temperature to 800 °C. The alloy annealed at 650 °C exhibited simple BCC structure with coarse equiaxed grains; after annealing at 850 °C, fine acicular and irregular block-like C14 Laves phases were uniformly precipitated in the grain and grain boundaries, meanwhile, the C14 Laves phase get coarser with the annealing temperature increased to 1050 °C. With the increase of annealing temperature, the microhardness of the Al<sub>0.2</sub>CrNbTiV alloy increased first and then decreased, reaching the maximum value of 692 HV after annealing at 850 °C. Due to the high dislocation density and the formation of kink bands, the alloy annealed at 650 °C showed a good combination of plastic and strength, with the work hardening ability strengthened simultaneously, the compressive yield strength could be up to 1454 MPa, with strain &gt;50 %. Due to the precipitation of the hard and brittle C14 Laves phase, the load-bearing capacity of the alloy was reduced after annealing at 850 °C and 1050 °C. However, the wear resistance of the alloy also improved with the presence of the hard phase. The friction coefficient of Al<sub>0.2</sub>CrNbTiV alloy annealed at 650 °C is 0.67, with the abrasive wear acting as the main wear mechanism, and the alloy after annealing at 850 °C shew the best wear resistance, with the friction coefficient of 0.63, and delamination wear mechanism.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"125 ","pages":"Article 106903"},"PeriodicalIF":4.2000,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Refractory Metals & Hard Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0263436824003512","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0

Abstract

The DSC analysis and heat treatment of the newly proposed Al0.2CrNbTiV lightweight refractory high-entropy alloy prepared by vacuum arc melting was investigated, and the evolutions of the microstructure and mechanical properties of the alloy after homogenization annealing at 650 °C, 850 °C and 1050 °C for 12 h were analyzed. The results show that the Al0.2CrNbTiV high-entropy alloy could maintain stable BCC solid solution structure from room temperature to 800 °C. The alloy annealed at 650 °C exhibited simple BCC structure with coarse equiaxed grains; after annealing at 850 °C, fine acicular and irregular block-like C14 Laves phases were uniformly precipitated in the grain and grain boundaries, meanwhile, the C14 Laves phase get coarser with the annealing temperature increased to 1050 °C. With the increase of annealing temperature, the microhardness of the Al0.2CrNbTiV alloy increased first and then decreased, reaching the maximum value of 692 HV after annealing at 850 °C. Due to the high dislocation density and the formation of kink bands, the alloy annealed at 650 °C showed a good combination of plastic and strength, with the work hardening ability strengthened simultaneously, the compressive yield strength could be up to 1454 MPa, with strain >50 %. Due to the precipitation of the hard and brittle C14 Laves phase, the load-bearing capacity of the alloy was reduced after annealing at 850 °C and 1050 °C. However, the wear resistance of the alloy also improved with the presence of the hard phase. The friction coefficient of Al0.2CrNbTiV alloy annealed at 650 °C is 0.67, with the abrasive wear acting as the main wear mechanism, and the alloy after annealing at 850 °C shew the best wear resistance, with the friction coefficient of 0.63, and delamination wear mechanism.
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
退火温度对 Al0.2CrNbTiV 轻质高熵难熔合金微观结构和力学性能的影响
研究了采用真空电弧熔炼法制备的新型 Al0.2CrNbTiV 轻质高熵难熔合金的 DSC 分析和热处理,分析了合金在 650 ℃、850 ℃ 和 1050 ℃ 下均匀化退火 12 h 后的微观组织和力学性能变化。结果表明,Al0.2CrNbTiV 高熵合金从室温到 800 ℃ 都能保持稳定的 BCC 固溶体结构。650 ℃退火的合金呈现简单的 BCC 结构,晶粒粗大等轴;850 ℃退火后,晶粒和晶界中均匀析出细小的针状和不规则块状 C14 Laves 相,同时随着退火温度升高至 1050 ℃,C14 Laves 相变得更加粗大。随着退火温度的升高,Al0.2CrNbTiV 合金的显微硬度先升高后降低,在 850 ℃ 退火后达到最大值 692 HV。由于高位错密度和扭结带的形成,650 ℃退火的合金显示出良好的塑性和强度结合,加工硬化能力同时得到加强,抗压屈服强度可达 1454 MPa,应变为 50%。由于析出了硬脆的 C14 Laves 相,在 850 ℃ 和 1050 ℃ 退火后,合金的承载能力有所下降。然而,合金的耐磨性也随着硬相的存在而提高。在 650 ℃ 退火的 Al0.2CrNbTiV 合金的摩擦系数为 0.67,主要磨损机制为磨料磨损,而在 850 ℃ 退火后的合金耐磨性最好,摩擦系数为 0.63,磨损机制为分层磨损。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 去求助
来源期刊
CiteScore
7.00
自引率
13.90%
发文量
236
审稿时长
35 days
期刊介绍: The International Journal of Refractory Metals and Hard Materials (IJRMHM) publishes original research articles concerned with all aspects of refractory metals and hard materials. Refractory metals are defined as metals with melting points higher than 1800 °C. These are tungsten, molybdenum, chromium, tantalum, niobium, hafnium, and rhenium, as well as many compounds and alloys based thereupon. Hard materials that are included in the scope of this journal are defined as materials with hardness values higher than 1000 kg/mm2, primarily intended for applications as manufacturing tools or wear resistant components in mechanical systems. Thus they encompass carbides, nitrides and borides of metals, and related compounds. A special focus of this journal is put on the family of hardmetals, which is also known as cemented tungsten carbide, and cermets which are based on titanium carbide and carbonitrides with or without a metal binder. Ceramics and superhard materials including diamond and cubic boron nitride may also be accepted provided the subject material is presented as hard materials as defined above.
期刊最新文献
NbC-Ni based cermets: Phase diagrams, microstructure and mechanical properties On the wear mechanisms of uncoated and coated pcBN tools during turning of 17–4 PH martensitic stainless steel Microstructure and mechanical properties of W-HfC alloy synthesized by in-situ fabrication via pressureless sintering Microstructure and mechanical characterizations of liquid phase sintered W-Ni-Cu heavy alloy modified with La2O3 and Fe addition Unraveling symmetric hierarchy in solid-state reactions of tungsten-based refractory metal carbides through first-principles calculations
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1