冷轧变形对CoCrNi中熵合金显微组织和力学性能的影响
Effect of Cold Rolling Deformation on Microstructure and Mechanical Properties of CoCrNi Medium Entropy Alloy
张明旭 1徐旺 1李涌泉 2董福元3
作者信息
- 1. 北方民族大学 材料科学与工程学院,宁夏 银川 750021
- 2. 北方民族大学 机电工程学院,宁夏 银川 750021;北方民族大学 粉体材料与特种陶瓷重点实验室,宁夏 银川 750021
- 3. 北方民族大学 材料科学与工程学院,宁夏 银川 750021;北方民族大学 粉体材料与特种陶瓷重点实验室,宁夏 银川 750021
- 折叠
摘要
中熵合金具有多种优异性,同时具有高强度和延展性.冷轧变形是提高中熵合金力学性能的一种即经济又有效的方法.对CoCrNi中熵合金进行室温不同变形量(25%,37.5%,50%,62.5%,75%)的冷轧,通过X射线衍射分析、显微组织分析和拉伸试验研究了室温下不同变形量对合金显微组织和力学性能的影响.结果表明:在室温不同变形量冷轧下CoCrNi中熵合金的组织仍为单一的FCC结构.CoCrNi中熵合金室温抗拉强度较低,随着变形量的增加,抗拉强度显著提升,但延展性相比铸态变差.
Abstract
Medium-entropy alloys have many excellent properties,and they have high strength and ductility at the same time.Cold rolling deformation is an economical and effective method to improve mechanical properties of medium entropy alloys.The CoCrNi medium-entropy alloy was cold-rolled at room temperature with different deformations(25%,37.5%,50%,62.5%,75%).The effects of different rolling deformation on the microstructure and mechanical properties of the alloy at room temperature were studied by X-ray diffractometer,microstructure analysis and tensile test.The results show that the microstructure of CoCrNi medium entropy alloy is still a single FCC structure under different cold rolling deformation at room temperature.The room temperature tensile strength of CoCrNi medium-entropy alloy is low.With the increase of deformation,the tensile strength increases significantly,but the ductility becomes worse than that of the cast state.
关键词
中熵合金/冷轧变形/力学性能/显微组织Key words
medium entropy alloys/cold rolling deformation/mechanical property/microstructure引用本文复制引用
基金项目
国家自然科学基金(51901002)
宁夏托举人才项目(TJGC2020142)
北方民族大学研究生创新项目(YCX21121)
出版年
2024
NETL
NSTL
万方数据