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首页> 外文期刊>Materials Science and Engineering >The evolution and characterizations of Al_3(Sc_xZr_(1-x)) phase in Al-Mg-based alloys proceeded by SLM
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The evolution and characterizations of Al_3(Sc_xZr_(1-x)) phase in Al-Mg-based alloys proceeded by SLM

机译：Al_3（SC_XZR_（1-X））在SLM进行的Al-Mg基合金中的进化和特征

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摘要

The addition of Sc and Zr endows selective laser melted Al-Mg-based alloys with exceptional properties, which are predominately related to the Al_3(Sc_xZr_(1_x)),J precipitates. The Al_3(Sc_xZr_(1_x)) precipitates formed in different stage of processing are identified as primary- Al_3(Sc_xZr_(1_x)) and aged- Al_3(Sc_xZr_(1_x)) according to different crystallographic characteristics. The experimental results show most of primary Al_3(Sc_xZr_(1_x)) particles located in the grain boundaries with incoherent interface and irregular shape, which is seldom reported in conventional casting. In contrast, the subsequent aging brings out more spherical Al_3(Sc_xZr_(1_x)) with coherent interface emerged in the grains. Combined the first-principle calculations with pseudo binary-diagram, we search the possible structures of Al_3(Sc_xZr_(1_x)) based on their formation enthalpy and binding energy, whose space group should be altered as Sc enters the Al_3Zr(DO_(23)) dispersoids. The most possible structure of primary Al_3(Sc_xZr_(1_x)) phase is evaluated as Ali2Sc3Zr, and the calculated crystallo-graphic parameters are consistent with the experimental results. As the primary Al_3(Sc_xZr_(1_x)) is hard to act as nucleation particle, it can be inferred that the grain refinement resulting from the modification and hindrance of these particles during grain growth. A corresponding ultimate tensile strength and ductility is separately about 521.26 ± 12.30 MPa and 15.83 ± 0.94% after aging at 325 °C for 4 h. The results demonstrate the difference between the primary Al_3(Sc_xZr_(1_x)) and the aged Al_3(Sc_xZr_(1_x)) as well as the formation of primary Al_3(Sc_xZr_(1_x)), which offer a new idea to design new alloy for additive manufacturing.
机译：添加SC和Zr的添加选择性激光熔化的基于Al-Mg基合金，其具有卓越的性质，其主要与Al_3（SC_XZR_（1_X）），j沉淀出来。在不同处理阶段形成的AL_3（SC_ZR_（1_X））沉淀物根据不同的晶体特性识别为主-A1_3（SC_XZR_（1_X））和Aged-Al_3（SC_XZR_（1_X））。实验结果显示了位于晶界中的大部分初级Al_3（SC_XZR_（1_X））颗粒，其具有不连贯的界面和不规则形状，其在传统铸造中很少报道。相反，随后的老化带出具有在晶粒中出现的相干界面的更多球形AL_3（SC_XZR_（1_X））。将第一原理计算与伪二进制图组合，我们根据其形成焓和绑定能量搜索AL_3（SC_XZR_（1_X））的可能结构，其空间组应被改变为SC进入AL_3ZR（DO_（23） ）分散体。主要AL_3（SC_XZR_（1_X））相位的最可能结构评估为ALI2SC3ZR，并且计算的晶体 - 图形参数与实验结果一致。作为主要的AL_3（SC_XZR_（1_X））难以充当成核颗粒，可以推断出由这些颗粒在晶粒生长期间的改性和障碍产生的晶粒细化。在325℃下老化4小时后，相应的极限拉伸强度和延展性在老化后分别为约521.26±12.30MPa和15.83±0.94％。结果展示了主AL_3（SC_XZR_（1_X））与AGED AL_3（SC_XZR_（1_X）之间的差异以及主要AL_3（SC_XZR_（1_X）），其提供了设计新合金的新想法添加剂制造。

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  • 来源
    《Materials Science and Engineering》 |2021年第8期|141863.1-141863.11|共11页
  • 作者

    Junhao Zhao; Liangshun Luo; Xiang Xue; Tong Liu; Lei Luo; Binbin Wang; Yanan Wang; Liang Wang; Yanqing Su; Jingjie Guo; Hengzhi Fu;

  • 作者单位

    National Key Laboratory for Precision Hot Processing of Metab School of Materials Science & Engineering Harbin Institute of Technology Harbin 150001 China HTT-Chungu Joint Research Center for Additive Manufacturing Materials Anhui Chungu 3D Printing Institute of Intelligent Equipment and Industrial Technology Wuhu Anhui 241200 China;

    National Key Laboratory for Precision Hot Processing of Metab School of Materials Science & Engineering Harbin Institute of Technology Harbin 150001 China HTT-Chungu Joint Research Center for Additive Manufacturing Materials Anhui Chungu 3D Printing Institute of Intelligent Equipment and Industrial Technology Wuhu Anhui 241200 China;

    National Key Laboratory for Precision Hot Processing of Metab School of Materials Science & Engineering Harbin Institute of Technology Harbin 150001 China HTT-Chungu Joint Research Center for Additive Manufacturing Materials Anhui Chungu 3D Printing Institute of Intelligent Equipment and Industrial Technology Wuhu Anhui 241200 China;

    HTT-Chungu Joint Research Center for Additive Manufacturing Materials Anhui Chungu 3D Printing Institute of Intelligent Equipment and Industrial Technology Wuhu Anhui 241200 China;

    National Key Laboratory for Precision Hot Processing of Metab School of Materials Science & Engineering Harbin Institute of Technology Harbin 150001 China;

    National Key Laboratory for Precision Hot Processing of Metab School of Materials Science & Engineering Harbin Institute of Technology Harbin 150001 China;

    National Key Laboratory for Precision Hot Processing of Metab School of Materials Science & Engineering Harbin Institute of Technology Harbin 150001 China HTT-Chungu Joint Research Center for Additive Manufacturing Materials Anhui Chungu 3D Printing Institute of Intelligent Equipment and Industrial Technology Wuhu Anhui 241200 China;

    National Key Laboratory for Precision Hot Processing of Metab School of Materials Science & Engineering Harbin Institute of Technology Harbin 150001 China HTT-Chungu Joint Research Center for Additive Manufacturing Materials Anhui Chungu 3D Printing Institute of Intelligent Equipment and Industrial Technology Wuhu Anhui 241200 China;

    National Key Laboratory for Precision Hot Processing of Metab School of Materials Science & Engineering Harbin Institute of Technology Harbin 150001 China HTT-Chungu Joint Research Center for Additive Manufacturing Materials Anhui Chungu 3D Printing Institute of Intelligent Equipment and Industrial Technology Wuhu Anhui 241200 China;

    National Key Laboratory for Precision Hot Processing of Metab School of Materials Science & Engineering Harbin Institute of Technology Harbin 150001 China HTT-Chungu Joint Research Center for Additive Manufacturing Materials Anhui Chungu 3D Printing Institute of Intelligent Equipment and Industrial Technology Wuhu Anhui 241200 China;

    National Key Laboratory for Precision Hot Processing of Metab School of Materials Science & Engineering Harbin Institute of Technology Harbin 150001 China;

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  • 正文语种 eng
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  • 关键词

    Aluminium; Selective laser melting; Al-Mg-Mn-Sc-Zr alloy; Precipitates; TEM;

    机译：铝;选择性激光熔化;Al-Mg-Mn-SC-ZR合金;沉淀物;TEM;

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