Effect of cold rolling and ageing treatment on the interface morphology and mechanical properties of maraging steel/medium-entropy alloy multilayer composite
Effect of cold rolling and ageing treatment on the interface morphology and mechanical properties of maraging steel/medium-entropy alloy multilayer composite
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DOI：
10.1088/2053-1591/ac330a
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发表时间：
2021-10
影响因子：
2.3
通讯作者：
Bao-xi Liu;Zhu-Tie Li;Cuixin Chen;Weibing Guo;Bing-Lei Yang;Bo Yang;Kailun Liu;Yifei Ge;F. Yin
中科院分区：
文献类型：
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作者：
Bao-xi Liu;Zhu-Tie Li;Cuixin Chen;Weibing Guo;Bing-Lei Yang;Bo Yang;Kailun Liu;Yifei Ge;F. Yin
对热轧18Ni300/CoCrNi多层复合材料进行冷轧及后续时效处理，分析了中熵合金（CoCrNi合金）的高加工硬化能力和马氏体时效钢（18Ni300）的时效析出强化效果。结果表明：随着冷轧压下率的升高，构成层与界面过渡层厚度的比值逐渐减小，界面形状由扁平变为波浪状，这主要是由于CoCrNi层发生了严重的加工硬化；同时，拉伸强度不断提高。当多层复合材料冷轧至0.5 mm时，其抗拉强度达到2 GPa以上，断裂伸长率保持在7%左右。时效后的抗拉强度高达2825 MPa，这是加工硬化、析出强化和强界面结合强化协同作用的结果。
The cold rolling and subsequent ageing treatment of hot-rolled 18Ni300/CoCrNi multilayer composites were carried out to analyse the high work hardening ability of medium-entropy alloy (CoCrNi alloy) and the ageing precipitate strengthening effect of maraging steel (18Ni300). The results show that with the rise of cold rolling reduction, the ratio constitute layer and interface transition layer thicknesses are gradually decreased, and the interface shape changes from a flat to a wavy state, which is mainly due to the serious work hardening of the CoCrNi layer. Meanwhile, the tensile strength continuously increased. When the multilayer composite is cold-rolled to 0.5 mm, its tensile strength reaches more than 2 GPa, and the fracture elongation remains at approximately 7%. After ageing, the superior tensile strength is as high as 2825 MPa, which is attributed to the synergistic effect of work hardening, precipitation strengthening and strong interface bonding strengthening.