| 赵朋飞,王育红,张新运,李宏民.含疏松缺陷的ZL205A合金力学性能研究[J].装备环境工程,2017,14(8):88-94. ZHAO Peng-fei,WANG Yu-hong,ZHANG Xin-yun,LI Hong-min.Mechanical Properties of the ZL205A Alloy of Porosity Defect[J].Equipment Environmental Engineering,2017,14(8):88-94. |
| 含疏松缺陷的ZL205A合金力学性能研究 |
| Mechanical Properties of the ZL205A Alloy of Porosity Defect |
| 投稿时间：2017-04-04 修订日期：2017-08-15 |
| DOI：10.7643/issn.1672-9242.2017.08.017 |
| 中文关键词: 疏松缺陷 ZL2015A试样 力学性能参数 本构关系 |
| 英文关键词:porosity defect ZL205A specimen mechanical property constitutive relationship |
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| 中文摘要: |
| 目的 获取含疏松缺陷ZL205A材料主要力学性能参数的变化规律及力学行为。方法 通过单轴拉伸实验测试，采用割线法估算含不同等级疏松ZL205A试样的力学性能参数；基于试样断面及载荷-位移曲线分析，归纳ZL205A材料的力学行为，并通过有限元模拟对假设的力学模型进行验证。结果 发现ZL205A材料的抗拉强度、伸长率、弹性模量及屈服强度指标呈现随疏松等级增加而降低的趋势，材料变形塑性屈服阶段不明显且具有脆性断裂特征。结论 Ramberg-Osgood方程适合于描述ZL205A材料的弹塑性本构关系。 |
| 英文摘要: |
| Objective To obtain variation rules and mechanical-behaviors of the main mechanical properties of ZL205A materials of porosity. Methods By uniaxial tensile testing, mechanical properties of ZL205A specimens including various grades of porosity were estimated with the secant method; based on analysis of fractured surface and load-displacement curve of specimens, the mechanical-behaviors and model of ZL205A materials were assumed and validated by finite element modeling. Results Values of tensile strength, extensibility, elastic modulus and yield strength of ZL205A materials exhibited decreasing trend with the increase of porosity grade. The materials in deformation had no obvious plastic yielding stage and brittle fracture. Conclusion The Ramberg-Osgood equation is suitable for describing the elastoplastic constitutive relationship of ZL205A materials. |
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