材料科学
纳米复合材料
复合材料
石墨烯
流动应力
应变率
变形(气象学)
动态再结晶
再结晶(地质)
变形机理
等温过程
晶界
热加工
纳米技术
热力学
微观结构
古生物学
物理
生物
作者
Xuejian Li,Yunqiao Hao,Yuefeng Wang,Hailong Shi,Xiaojun Wang,Xiaoshi Hu,Chao Xu,Jianxin Yu
标识
DOI:10.1016/j.jallcom.2024.175978
摘要
It is necessary to have a deep understanding of the deformation behavior of magnesium matrix nanocomposites to achieve precise control of components. In this work, the as-cast graphene reinforced magnesium matrix nanocomposites were produced by in-situ vapor-liquid reaction. The flow stress features of the nanocomposites were studied by isothermal compression. The constitutive equation and the processing map of nanocomposites were established under the given load conditions based on the stress-strain curve. The sample is in a stable processing state at a compression temperature of 350 ℃∼450 ℃ with a compression rate of 0.001 s−1 and a compression temperature of 350 ℃ with a compression rate of 0.01 s−1. Furthermore, graphene distributed within the grains facilitated the retention of high dislocation density, which increased the driving force of recrystallization. Recrystallized grains can be generated by the progressive rotation of subgrain due to grain boundary migration being inhibited by graphene. This work provides an important guideline for the optimization of deformation techniques of in-situ nanocomposites.
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