304不锈钢高温非比例多轴应变循环变形行为研究

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基金项目:

国家自然科学基金NSFC10402037和西南交通大学博士生创新基金资助项目

On Cyclic Deformation of 304 Stainless Steel under Strain-Controlled Nonproportionally Multiaxial Loading at High Temperatures

Department of Appiied Mechanics and Engineering, Southwest Jiaotong University, Chengdu, 610031, China

摘要: 为了对材料的高温应变循环变形行为进行精确的本构描述,在350℃和700℃下,对304不锈钢在不同加载路径下的单轴和非比例多轴应变循环变形行为进行了实验研究。讨论了材料在不同加载路径及不同工况下的循环硬化特性。研究表明：304不锈钢的高温非比例多轴应变循环变形行为具有明显的温度依赖性和路径依赖性。研究结果为后续循环本构模型的建立提供了实验基础。
- 304不锈钢 /
- 非比例 /
- 多轴加载 /
- 高温 /
- 应变循环
Abstract: In order to accurately describe the strain-controlled cyclic deformation of material at high temperatures,an experimental research was carried out on the cyclic deformation of 304 stainless steel sub- jected to uni-axial and non-proportionally multi-axial cyclic straining at 350℃C and 700℃.The cyclic hard- ening behavior under different loading paths and different load conditions was studied.It is shown from the research that the non-proportionally multi-axial strain-controlled cyclic deformation of 304 stainless steel at high temperatures has distinct dependence on temperatures and loading paths.This result is useful to estab- lish constitutive model for the cyclic deformation of the material.
- 304 stainless steel /
- Non-proportionality /
- Multi-axial Loading /
- High Temperature /
- Cyclic Strain