Excelling mechanical response of a powder metallurgy medium entropy alloy under extreme loading conditions

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-02-03 DOI:10.1016/j.powtec.2025.120737

Atif Muhammad , Yulong Li , Du Bing , Aamir Raza Muhammad , Zakir Sheikh Muhammad

{"title":"Excelling mechanical response of a powder metallurgy medium entropy alloy under extreme loading conditions","authors":"Atif Muhammad , Yulong Li , Du Bing , Aamir Raza Muhammad , Zakir Sheikh Muhammad","doi":"10.1016/j.powtec.2025.120737","DOIUrl":null,"url":null,"abstract":"<div><div>Elevated temperatures coupled with dynamic loads present formidable challenges in advanced applications. Using advanced powder metallurgy (PM), CoCrNi, an FCC alloy, was crafted with ultrafine-grained microstructure devoid of any second phase, oxides, or precipitates. Despite the ultrafine microstructure, the material retains its work hardening at room and elevated temperatures. The yield strength of PM alloy shows a 300 % elevation compared to cast alloy at room temperature. Microstructural analysis revealed that mechanical performance stems from the synergistic effect of refined microstructure and nano-domain defects, including stacking faults, dislocations, twining, and nano-grains in raw materials. During dynamic deformation, multivariant twins evolved to contribute towards strengthening and work hardening. Saliently, the alloy exhibits remarkable high-temperature strength and resilience without softening or fracturing. The presence of nano-twins at high temperatures is one of the reasons for the thermal stability of material at elevated temperatures.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"454 ","pages":"Article 120737"},"PeriodicalIF":4.5000,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Powder Technology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0032591025001329","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}

引用次数: 0

Abstract

Elevated temperatures coupled with dynamic loads present formidable challenges in advanced applications. Using advanced powder metallurgy (PM), CoCrNi, an FCC alloy, was crafted with ultrafine-grained microstructure devoid of any second phase, oxides, or precipitates. Despite the ultrafine microstructure, the material retains its work hardening at room and elevated temperatures. The yield strength of PM alloy shows a 300 % elevation compared to cast alloy at room temperature. Microstructural analysis revealed that mechanical performance stems from the synergistic effect of refined microstructure and nano-domain defects, including stacking faults, dislocations, twining, and nano-grains in raw materials. During dynamic deformation, multivariant twins evolved to contribute towards strengthening and work hardening. Saliently, the alloy exhibits remarkable high-temperature strength and resilience without softening or fracturing. The presence of nano-twins at high temperatures is one of the reasons for the thermal stability of material at elevated temperatures.

Abstract Image

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.