{"title":"Effect of Network Structure Morphology on Fatigue Crack Propagation in Sintered Compact Composed of High-Entropy Alloy CrMnFeCoNi and 304SS","authors":"Arisa Ito, Keisuke Fujita, Hiroshi Fujiwara, Shoichi Kikuchi","doi":"10.1111/ffe.14546","DOIUrl":null,"url":null,"abstract":"<div>\n \n <p>In this study, high-entropy alloy (HEA; CrMnFeCoNi) and austenitic stainless steel (SS; AISI304L) powders were consolidated to fabricate sintered compacts having a network structure composed of a coarse-grained SS structure surrounded by an interconnected fine-grained HEA structure. A small-particle-size HEA powder and large-particle-size SS powder were mixed at various volume ratios and then consolidated by spark plasma sintering. The threshold stress intensity factor range, Δ<i>K</i><sub>th</sub>, for the sintered compacts with a HEA network structure did not depend on the volume fractions of HEA and SS, whereas Δ<i>K</i><sub>th</sub> for the sintered compacts with the opposite SS network structure tended to decrease with increasing HEA content. The effective threshold stress intensity factor range, Δ<i>K</i><sub>eff,th</sub>, for the HEA network structure was higher than that for the opposite SS network series because fatigue cracks preferentially propagated through the coarse-grained SS structure with a high Δ<i>K</i><sub>eff,th</sub> in the HEA network structure.</p>\n </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"48 3","pages":"1352-1363"},"PeriodicalIF":3.1000,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Fatigue & Fracture of Engineering Materials & Structures","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/ffe.14546","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
引用次数: 0
Abstract
In this study, high-entropy alloy (HEA; CrMnFeCoNi) and austenitic stainless steel (SS; AISI304L) powders were consolidated to fabricate sintered compacts having a network structure composed of a coarse-grained SS structure surrounded by an interconnected fine-grained HEA structure. A small-particle-size HEA powder and large-particle-size SS powder were mixed at various volume ratios and then consolidated by spark plasma sintering. The threshold stress intensity factor range, ΔKth, for the sintered compacts with a HEA network structure did not depend on the volume fractions of HEA and SS, whereas ΔKth for the sintered compacts with the opposite SS network structure tended to decrease with increasing HEA content. The effective threshold stress intensity factor range, ΔKeff,th, for the HEA network structure was higher than that for the opposite SS network series because fatigue cracks preferentially propagated through the coarse-grained SS structure with a high ΔKeff,th in the HEA network structure.
期刊介绍：
Fatigue & Fracture of Engineering Materials & Structures (FFEMS) encompasses the broad topic of structural integrity which is founded on the mechanics of fatigue and fracture, and is concerned with the reliability and effectiveness of various materials and structural components of any scale or geometry. The editors publish original contributions that will stimulate the intellectual innovation that generates elegant, effective and economic engineering designs. The journal is interdisciplinary and includes papers from scientists and engineers in the fields of materials science, mechanics, physics, chemistry, etc.
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