| 共格沉淀析出过程的微观结构演化相场法模拟 |
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| 引用本文： | 赵宇宏,侯 华.共格沉淀析出过程的微观结构演化相场法模拟[J].稀有金属材料与工程,2012,41(10):2163-2168. |
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| 作者姓名： | 赵宇宏 侯 华 |
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| 作者单位： | 1. 兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州730050;兰州理工大学有色金属合金及加工教育部重点实验室 甘肃兰州730050
2. 兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州,730050 |
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| 基金项目： | 国家自然科学基金，国家“973”计划前期研究专项 |
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| 摘 要： | 用铜模吸铸法制备了Zr(65-x)Cu17.5Ni10Al7.5Fex(x=0,1,2,3,4,5,at％)块体合金,利用X射线衍射仪(XRD)、透射电镜(TEM)、同步热分析(DSC)、万能试验机和扫描电镜(SEM)研究了Fe对Zr基合金的非晶形成能力、热稳定性及力学性能的影响.结果表明:适量添加Fe元素有利于提高该合金的非晶形成能力和热稳定性,当Fe含量为x=2时,其内部结构为完全非晶结构,并且此成分具有较高的GFA和热稳定性(△Tx=58 K).Fe元素的适量加入也有利于提高该合金的强度和塑性,其中x=2的块体非晶合金的抗压强度σf、断裂应变εf和塑性应变εp分别高达2338 MPa、12.4％和2.0％.
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| 关 键 词： | Zr基块体非晶合金 非晶形成能力 热稳定性 力学性能 塑性 |
| 收稿时间： | 2011/11/11 0:00:00 |
Phase-Field Model Simulation for the Microstructure Evolution of Coherent Precipitates |
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| Zhao Yuhong and Hou Hua.Phase-Field Model Simulation for the Microstructure Evolution of Coherent Precipitates[J].Rare Metal Materials and Engineering,2012,41(10):2163-2168. |
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| Authors: | Zhao Yuhong and Hou Hua |
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| Affiliation: | State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China |
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| Abstract: | The microstructure evolution of coherent precipitates was simulated with the phase-field model by computer and the influence of different strain energy on the precipitation morphology was also discussed. Results show that when the coherent strain energy is 0, spherical-shaped precipitates or flocculent structure distribute randomly with isotropic morphology. With the elastic strain energy increasing, the arrangement orientation increases, quasi-periodical macro lattice structures and sandwich-shaped structures are formed with anisotropic morphology. The simulation results are in good agreement with the experimental |
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| Keywords: | Zr-based bulk amorphous alloy glass forming ability thermal stability mechanical property plasticity |
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