| 热处理温度对B2型Zr_(54)Co_(46)合金微观组织及力学性能的影响 |
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| 引用本文： | 李培友,童婷,王永善.热处理温度对B2型Zr_(54)Co_(46)合金微观组织及力学性能的影响[J].有色金属工程,2019,9(10). |
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| 作者姓名： | 李培友 童婷 王永善 |
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| 作者单位： | 陕西理工大学 材料科学与工程学院,陕西理工大学 材料科学与工程学院,陕西理工大学 材料科学与工程学院 |
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| 基金项目： | 陕西省教育厅专项基金( 16JK1152)，陕西理工大学博士科研启动项目( SLGKYQD2-22) |
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| 摘 要： | 利用X射线衍射仪(XRD)、光学显微镜(OM)、扫描电子显微镜(SEM)、万能试验机等研究了不同热处理温度下Zr_(54)Co_(46)合金的显微组织和力学性能。结果表明,对于热处理Zr_(54)Co_(46)试样,其相结构均由B_2相和第二相Zr_2Co组成;随着热处理温度的增加,Zr_2Co相含量减少,且在723K和773K下热处理试样的Zr_2Co相体积分数相差较小。在723K和773K下热处理试样虽然强度下降,但塑性形变增加;热处理Zr_(54)Co_(46)合金维氏硬度均小于铸态合金维氏硬度,且热处理合金具有较强加工硬化能力或塑性变形抗力。铸态试样的断裂机制主要为延性断裂并伴有沿晶断裂机制;而试样在723K和773K下进行热处理,试样断裂机制主要为延性断裂。
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| 关 键 词： | Zr-Co合金 微观组织 力学性能 延性断裂 |
| 收稿时间： | 2019/1/12 0:00:00 |
| 修稿时间： | 2019/2/18 0:00:00 |
Effect of heat-treatment temperature on microstructure and mechanical properties of B2-type Zr54Co46 alloy |
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| Li Pei-you,Tong Ting and Wang Yongshan.Effect of heat-treatment temperature on microstructure and mechanical properties of B2-type Zr54Co46 alloy[J].Nonferrous Metals Engineering,2019,9(10). |
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| Authors: | Li Pei-you Tong Ting and Wang Yongshan |
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| Affiliation: | School of Materials Science and Engineering,Shaanxi University of Technology,School of Materials Science and Engineering,Shaanxi University of Technology,School of Materials Science and Engineering,Shaanxi University of Technology |
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| Abstract: | The microstructure and mechanical properties of Zr54Co46 alloy at different heat treatment temperatures were investigated by means of X-ray diffractometer, metallographic microscope, universal testing machine and scanning electron microscope. The results show that the microstructure of Zr54Co46 sample is composed of B2 phase and second phase Zr2Co phase, and the content of Zr2Co phase decreases with the increase of heat-treatment temperature, and the volume fraction difference of Zr2Co phase is small at the heat treatment temperatures of 723 K and 773 K. At the heat treatment temperatures of 723 K and 773 K, the strength of the samples decreases, but the plastic deformation increases. In addition, the fracture mechanism of as-cast specimens is mainly ductile fracture with intergranular fracture mechanism, while the fracture mechanism of specimens at the heat treatment temperatures of 723 K and 773 K are ductile fracture. |
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