通过添加Cu51Zr14孕育剂颗粒承载的多层石墨烯提高Cu-11.9Al-2.5Mn形状记忆合金的综合性能

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中文摘要：为了提高Cu-11.9Al-2.5Mn形状记忆合金(SMA)的综合性能,通过制备多层石墨烯(MLG)-Cu51Zr14复合粉末冷压预制体,将MLG由Cu51Zr14孕育剂颗粒承载后添加并分散于该合金中.在所制备的新型MLG/Cu-Al-Mn复合材料中,碎片状或絮状的MLG与Cu-Al-Mn基体结合良好.MLG可以阻碍Cu-Al-Mn SMA晶粒的粗化,并在MLG/Cu-Al-Mn界面附近产生热失配位错.MLG/Cu-Al-Mn复合材料的阻尼和力学性能显著提高,当MLG的含量达到0.2％(质量分数)时,其最高室温阻尼为0.0558,抗拉强度为801.5 MPa,伸长率为10.8％,硬度为HV308.基于深入的显微组织观察,结合内耗理论以及金属的强韧化理论,对相关机理进行讨论.

外文标题：Improving comprehensive properties of Cu-11.9Al-2.5Mn shape memory alloy by adding multi-layer graphene carried by Cu51Zr14 inoculant particles

外文摘要：In order to improve the comprehensive properties of the Cu-11.9Al-2.5Mn shape memory alloy(SMA),multilayer graphene(MLG)carried by Cu51Zr14 inoculant particles was incorporated and dispersed into this alloy through preparing the preform of the cold-pressed MLG-Cu51Zr14 composite powders.In the resultant novel MLG/Cu-Al-Mn composites,MLG in fragmented or flocculent form has a good bonding with the Cu-Al-Mn matrix.MLG can prevent the coarsening of grains of the Cu-Al-Mn SMA and cause thermal mismatch dislocations near the MLG/Cu-Al-Mn interfaces.The damping and mechanical properties of the MLG/Cu-Al-Mn composites are significantly improved.When the content of MLG reaches 0.2 wt.％,the highest room temperature damping of 0.0558,tensile strength of 801.5 MPa,elongation of 10.8％,and hardness of HV 308 can be obtained.On the basis of in-depth observation of microstructures,combined with the theory of internal friction and strengthening and toughening theories of metals,the relevant mechanisms are discussed.

外文关键词：

Cu-Al-Mn shape memory alloymultilayer graphene(MLG)microstructureinterfacedampingmechanical properties

作者：

焦志娴、王清周、丁燕军、殷福星、徐超辉、韩翠红、范其香

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作者单位：

天津职业技术师范大学机械工程学院,天津 300222

河北工业大学材料科学与工程学院,天津市材料层状复合与界面控制技术重点实验室,天津 300130

中南大学材料科学与工程学院,长沙 410083

广东省科学院新材料研究所,广州 510651

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关键词：

Cu-Al-Mn形状记忆合金多层石墨烯(MLG) 显微组织界面阻尼力学性能

基金：

Natural Science Foundation of Hebei Province,ChinaNational Natural Science Foundation of ChinaFoundation Strengthening Program,ChinaHebei Province Graduate Innovation Funding Project,ChinaJiangsu Provincial Policy Guidance Program(Special Project for the Introduction of Foreign Talents)Talent Introduction ProgrScience Plan Foundation of Tianjin Municipal Education Commission,China

项目编号：

E2021202017520610382019-JCJQ-ZD-142-00CXZZBS2022032BX20210242021KJ026

出版年：

2024

DOI：

10.1016/S1003-6326(24)66607-0

中国有色金属学报(英文版)

中国有色金属学会

中国有色金属学报(英文版)

CSTPCD

影响因子：1.183

ISSN：1003-6326

年,卷(期)：2024.34(10)