Effect of solidification rate on dendrite segregation and mechanical properties of Cu-15Ni-8Sn alloy prepared by directional solidification
作者机构：Faculty of Materials Metallurgy and ChemistryJiangxi University of Science and TechnologyGanzhou 341000JiangxiChina Jiangxi Advanced Copper Industry Research InstituteYingtan 335000JiangxiChina
出 版 物：《Journal of Iron and Steel Research International》 (国际钢铁研究杂志)
年 卷 期：2023年第30卷第8期
页 面：1586-1597页
核心收录：
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
基 金：supported by the National Key Research and Development Program of China(Grant No.2020YFA0714400) Science and Technology Projects of Jiangxi Provincial Department of Education(Grant Nos.GJ210843 and GJJ200873) Scientific Research Starting Foundation for Advanced Talents of Jiangxi University of Science and Technology(Grant No.205200100570) the Project of the Key Scientific and Technological of Jiangxi Province(Grant No.20181BCB19003) Ningbo Enterprise Innovation Consortium Special Project(Grant No.2021H003)
主 题：Cu-15Ni-8Sn alloy Dendrite segregation Directional solidification Discontinuous precipitation structure DO_(22)ordered phase
摘 要：The microstructures and mechanical properties of the directionally solidified Cu-15Ni-8Sn alloy were investigated at solidification rates ranging from 100 to 3000μm/*** results showed that the solidification rate significantly affects the phase distribution of the as-cast Cu-15Ni-8Sn *** primary and secondary dendritic spacing reduces and eventually becomes stable as the solidification rate ***,the size of the primary phase decreases,and its distribution becomes more *** most severe segregation problem of this alloy has been greatly *** solidification at 100μm/s,the as-cast Cu-15Ni-8Sn alloy consists of the α-Cu matrix,γ-CuNi_(2)Sn phase,discontinuous precipitation structure,modulated structure,and DO_(22) ordered ***,as the solidification rate increases,the discontinuous precipitation structure,modulated structures,and DO_(22) ordered phases decrease and even disappear,reducing *** the solidification rate increases,after homogenization treatment,the composition and microhardness distributions of Cu-15Ni-8Sn alloy become more *** time for homogenization is also *** reduces production energy usage and facilitates further mechanical processing.
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