双辊铸轧非晶复合材料条带的微观组织与力学性能  

Microstructure and mechanical properties of metallic glass composite strips fabricated by twin-roll casting

作　　者：武毅 张龙 颜廷毅 王金贺 付华萌 张宏伟 李宏 王爱民 张海峰 Yi Wu;Long Zhang;Tingyi Yan;Jinhe Wang;Huameng Fu;Hongwei Zhang;Hong Li;Aiming Wang;Haifeng Zhang(Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China;School of Metallurgy,Northeastern University,Shenyang 110819,China)

机构地区：[1]Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China [2]School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China [3]School of Metallurgy,Northeastern University,Shenyang 110819,China

出　　处：《Science China Materials》2023年第10期4046-4053,共8页中国科学（材料科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(52171164 and 51790484);the National Key Laboratory of Science and Technology on Materials under Shock and Impact(WDZC2022-13);the Natural Science Foundation of Liaoning Province(2021-MS-009);China Manned Space Engineering(YYMT1201EXP08);the Youth Innovation Promotion Association CAS(2021188)。

摘　　要：本文设计并制造了一种能够制备高质量非晶复合材料条带的新型配有水冷铜板的双辊铸轧原型机.利用该轧机在不同温度下成功制备了具有三种不同体积分数β-Ti枝晶的非晶复合材料带材(简称BT30,BT48和BT60),并通过一系列三点弯曲试验研究了其力学性能.结果表明,在高温下轧制的带材,高温元素在中间区域富集,导致成分分布不均.此外,由于铸轧过程中热力耦合导致在非晶复合材料中存在较大的内应力,这会显著影响其力学性能.新型铸轧设备为制备非晶复合材料带材提供了新的途径,基于该设备进行的研究深化了对非晶复合材料带材微观组织及力学性能的理解.Twin-roll casting(TRC)technique has been proven to be a feasible method for producing metal strips.In this work,a new laboratory-scale twin-roll caster capable of producing long and straight metallic glass composite(MGC)strips was designed and manufactured.The new twin-roll caster generated three types of Ti-based MGC strips(BT30,BT48,and BT60)with varying in situ β-Ti volume fractions at temperatures of 1273 and 1473 K.A series of three-point bending tests were conducted on the Ti-based MGC strips.The results demonstrate that the elements with higher melting temperatures are richer in the middle of the strips rolled at a higher temperature,leading to uneven distributions of composition in the middle and the edge of the strips.The mechanical behavior of MGC strips is greatly influenced by residual stress induced by the thermo-mechanical effect during the TRC process.The large β-Ti crystals with lattice distortion during bending greatly restrict the deformation band,leading to enhanced strength but poor plasticity of the BT48 strip.In comparison,due to the high fraction of crystals with large released crystallization energy,the BT60 strips lead to the severe relaxation of the glassy matrix and cause extreme brittleness.These findings not only provide a new method for preparing MGC strips but also deepen our understanding of the mechanical properties of MGC strips.

关 键 词：metallic glass composite strips twin-roll casting microstructure mechanical properties 

分 类 号：TB331[一般工业技术—材料科学与工程] TG335.9[金属学及工艺—金属压力加工]