Martina Freund , Zhuocheng Xie , Pei-Ling Sun , Lukas Berners , Joshua Spille , Hexin Wang , Carsten Thomas , Michael Feuerbacher , Marta Lipinska-Chwalek , Joachim Mayer , Sandra Korte-Kerzel
{"title":"化学成分对 C15 Ca-Al-Mg Laves 相室温塑性的影响","authors":"Martina Freund , Zhuocheng Xie , Pei-Ling Sun , Lukas Berners , Joshua Spille , Hexin Wang , Carsten Thomas , Michael Feuerbacher , Marta Lipinska-Chwalek , Joachim Mayer , Sandra Korte-Kerzel","doi":"10.1016/j.actamat.2024.120124","DOIUrl":null,"url":null,"abstract":"<div><p>The influence of chemical composition changes on the room temperature mechanical properties in the binary Ca<sub>33</sub>Al<sub>67</sub> <em>C</em>15 CaAl<sub>2</sub> Laves phase were investigated in two ternary alloys with off-stoichiometric compositions with 5.7 at.% Mg substitution (Ca<sub>33</sub>Al<sub>61</sub>Mg<sub>6</sub>) and 10.8 at.% Mg and 3.0 at.% Ca substitution (Ca<sub>36</sub>Al<sub>53</sub>Mg<sub>11</sub>) and compared to the stoichiometric (Ca<sub>33</sub>Al<sub>67</sub>) composition. Cubic Ca-Al-Mg Laves phases with multiple crystallographic orientations were characterised and deformed using nanoindentation. The hardness and indentation modulus were measured to be 4.1 ± 0.3 GPa and 71.3 ± 1.5 GPa for Ca<sub>36</sub>Al<sub>53</sub>Mg<sub>11</sub>, 4.6 ± 0.2 GPa and 80.4 ± 3.8 GPa for Ca<sub>33</sub>Al<sub>61</sub>Mg<sub>6</sub> and 4.9 ± 0.3 GPa and 85.5 ± 4.0 GPa for Ca<sub>33</sub>Al<sub>67</sub>, taken from our previous study, respectively. The resulting surface traces as well as slip and crack planes, were distinguished on the indentation surfaces, revealing the activation of several different {11n} slip systems, as further confirmed by conventional transmission electron microscopic observations. Additionally, the deformation mechanisms and corresponding energy barriers of activated slip systems were evaluated by atomistic simulations.</p></div>","PeriodicalId":238,"journal":{"name":"Acta Materialia","volume":null,"pages":null},"PeriodicalIF":8.3000,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1359645424004750/pdfft?md5=2d22e5e676831311e617239ada35abe2&pid=1-s2.0-S1359645424004750-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Influence of chemical composition on the room temperature plasticity of C15 Ca-Al-Mg Laves phases\",\"authors\":\"Martina Freund , Zhuocheng Xie , Pei-Ling Sun , Lukas Berners , Joshua Spille , Hexin Wang , Carsten Thomas , Michael Feuerbacher , Marta Lipinska-Chwalek , Joachim Mayer , Sandra Korte-Kerzel\",\"doi\":\"10.1016/j.actamat.2024.120124\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The influence of chemical composition changes on the room temperature mechanical properties in the binary Ca<sub>33</sub>Al<sub>67</sub> <em>C</em>15 CaAl<sub>2</sub> Laves phase were investigated in two ternary alloys with off-stoichiometric compositions with 5.7 at.% Mg substitution (Ca<sub>33</sub>Al<sub>61</sub>Mg<sub>6</sub>) and 10.8 at.% Mg and 3.0 at.% Ca substitution (Ca<sub>36</sub>Al<sub>53</sub>Mg<sub>11</sub>) and compared to the stoichiometric (Ca<sub>33</sub>Al<sub>67</sub>) composition. Cubic Ca-Al-Mg Laves phases with multiple crystallographic orientations were characterised and deformed using nanoindentation. The hardness and indentation modulus were measured to be 4.1 ± 0.3 GPa and 71.3 ± 1.5 GPa for Ca<sub>36</sub>Al<sub>53</sub>Mg<sub>11</sub>, 4.6 ± 0.2 GPa and 80.4 ± 3.8 GPa for Ca<sub>33</sub>Al<sub>61</sub>Mg<sub>6</sub> and 4.9 ± 0.3 GPa and 85.5 ± 4.0 GPa for Ca<sub>33</sub>Al<sub>67</sub>, taken from our previous study, respectively. The resulting surface traces as well as slip and crack planes, were distinguished on the indentation surfaces, revealing the activation of several different {11n} slip systems, as further confirmed by conventional transmission electron microscopic observations. Additionally, the deformation mechanisms and corresponding energy barriers of activated slip systems were evaluated by atomistic simulations.</p></div>\",\"PeriodicalId\":238,\"journal\":{\"name\":\"Acta Materialia\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":8.3000,\"publicationDate\":\"2024-06-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S1359645424004750/pdfft?md5=2d22e5e676831311e617239ada35abe2&pid=1-s2.0-S1359645424004750-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Acta Materialia\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1359645424004750\",\"RegionNum\":1,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta Materialia","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1359645424004750","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Influence of chemical composition on the room temperature plasticity of C15 Ca-Al-Mg Laves phases
The influence of chemical composition changes on the room temperature mechanical properties in the binary Ca33Al67C15 CaAl2 Laves phase were investigated in two ternary alloys with off-stoichiometric compositions with 5.7 at.% Mg substitution (Ca33Al61Mg6) and 10.8 at.% Mg and 3.0 at.% Ca substitution (Ca36Al53Mg11) and compared to the stoichiometric (Ca33Al67) composition. Cubic Ca-Al-Mg Laves phases with multiple crystallographic orientations were characterised and deformed using nanoindentation. The hardness and indentation modulus were measured to be 4.1 ± 0.3 GPa and 71.3 ± 1.5 GPa for Ca36Al53Mg11, 4.6 ± 0.2 GPa and 80.4 ± 3.8 GPa for Ca33Al61Mg6 and 4.9 ± 0.3 GPa and 85.5 ± 4.0 GPa for Ca33Al67, taken from our previous study, respectively. The resulting surface traces as well as slip and crack planes, were distinguished on the indentation surfaces, revealing the activation of several different {11n} slip systems, as further confirmed by conventional transmission electron microscopic observations. Additionally, the deformation mechanisms and corresponding energy barriers of activated slip systems were evaluated by atomistic simulations.
期刊介绍:
Acta Materialia serves as a platform for publishing full-length, original papers and commissioned overviews that contribute to a profound understanding of the correlation between the processing, structure, and properties of inorganic materials. The journal seeks papers with high impact potential or those that significantly propel the field forward. The scope includes the atomic and molecular arrangements, chemical and electronic structures, and microstructure of materials, focusing on their mechanical or functional behavior across all length scales, including nanostructures.