摘要
In order to obtain good strength−plasticity synergy for a medium entropy alloy(MEA)CrCoNi,cold rolling,asymmetric rolling,cryorolling and asymmetric-cryorolling with subsequent annealing at different temperatures were conducted.The results showed that the asymmetric-cryorolled alloy achieved a high strength of over 1.6 GPa.After annealing at 1073 K,it retained a high strength of~1 GPa while the elongation reached nearly 60%.After annealing,the heterogeneous characteristics were formed in asymmetric-cryorolled samples,which were found to be more distinct than those of the samples subjected to asymmetric rolling.This resulted in the generation of high strength and ductility.
为了获得具有更好强塑性平衡的CrCoNi中熵合金,采用冷轧、异步轧制、深冷轧制和深冷异步轧制4种工艺对中熵合金CrCoNi进行加工,并对合金进行不同温度的退火处理。研究结果表明:深冷异步轧制的合金获得超过1.6 GPa的高强度,当经过1073 K的退火处理后,在具有接近60%的伸长率的同时,仍然保留接近1 GPa的强度。采用深冷异步轧制和退火后,得到较室温异步轧制更为明显的异质特征,这使材料具有更高的强度与更好的塑性。
作者
Yu-ze WU
Zhao-yang ZHANG
Juan LIU
Charlie KONG
Yu WANG
Puneet TANDON
Alexander PESIN
Hai-liang YU
吴雨泽;张朝阳;刘娟;Charlie KONG;Yu WANG;Puneet TANDON;Alexander PESIN;喻海良(中南大学高性能复杂制造国家重点实验室,长沙410083;中南大学机电工程学院,长沙410083;中南大学轻合金研究院,长沙410083;Mark Wainwright Analytical Centre,University of New South Wales,Sydney,NSW 2052,Australia;PDPM Indian Institute of Information Technology,Design and Manufacturing,Jabalpur 482005,India;Laboratory of Mechanics of Gradient Nanomaterials,Nosov Magnitogorsk State Technical University,Magnitogorsk 455000,Russia)
基金
supported by the Hunan High-Tech Industry Science and Technology Innovation Leading Plan,China(No.2020GK2032)
the Huxiang High-Level Talent Gathering Project of Hunan Province,China(No.2018RS3015)
the Innovation Driven Program of Central South University,China(No.2019CX006)
the Research Fund of the Key Laboratory of High Performance Complex Manufacturing at Central South University,China。
