Z.L. Wu , T. Nakata , C. Xu , G.Z. Tang , X.J. Wang , K.K. Deng , G.S. Wang , S. Kamado , L. Geng
{"title":"Plastic deformation and fracture behavior of dilute Mg-Al-Ca-Mn alloys with bimodal grain structure","authors":"Z.L. Wu , T. Nakata , C. Xu , G.Z. Tang , X.J. Wang , K.K. Deng , G.S. Wang , S. Kamado , L. Geng","doi":"10.1016/j.msea.2024.147624","DOIUrl":null,"url":null,"abstract":"<div><div>Deformation and fracture behavior of the Mg-1Al-0.2Ca-0.7Mn (wt.%) alloy with a bimodal grain structure were investigated by varying the proportions of recrystallized (RXed) grains. Three samples were prepared with varying proportions of RXed grains at 40 % (F40), 52 % (F50), and 66 % (F65), respectively. The strain distribution among different grains was visualized using the Digital Image Correlation (DIC) technique, and X-ray Computed Tomography (CT) was utilized to observe crack distribution. The results indicate that the sample with 66 % RXed grains demonstrated a favorable strength-ductility balance compared to the other two samples. This can be attributed to its superior capacity for strain transfer and expansion. Among them, the RXed grains promoted strain transmission and inhibited crack propagation, while the unRXed grains assisted in localized strain release and strengthened the alloy. This could enhance understanding of the strength-ductility mechanism in bimodal grain structures.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"922 ","pages":"Article 147624"},"PeriodicalIF":6.1000,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Science and Engineering: A","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0921509324015557","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Deformation and fracture behavior of the Mg-1Al-0.2Ca-0.7Mn (wt.%) alloy with a bimodal grain structure were investigated by varying the proportions of recrystallized (RXed) grains. Three samples were prepared with varying proportions of RXed grains at 40 % (F40), 52 % (F50), and 66 % (F65), respectively. The strain distribution among different grains was visualized using the Digital Image Correlation (DIC) technique, and X-ray Computed Tomography (CT) was utilized to observe crack distribution. The results indicate that the sample with 66 % RXed grains demonstrated a favorable strength-ductility balance compared to the other two samples. This can be attributed to its superior capacity for strain transfer and expansion. Among them, the RXed grains promoted strain transmission and inhibited crack propagation, while the unRXed grains assisted in localized strain release and strengthened the alloy. This could enhance understanding of the strength-ductility mechanism in bimodal grain structures.
期刊介绍:
Materials Science and Engineering A provides an international medium for the publication of theoretical and experimental studies related to the load-bearing capacity of materials as influenced by their basic properties, processing history, microstructure and operating environment. Appropriate submissions to Materials Science and Engineering A should include scientific and/or engineering factors which affect the microstructure - strength relationships of materials and report the changes to mechanical behavior.