Hot compression characteristics of TiBw/Ti6Al4V composites with novel network microstructure using processing maps
Hot compression characteristics of TiBw/Ti6Al4V composites with novel network microstructure using processing maps
复制标题
使用加工图研究具有新型网络微观结构的 TiBw/Ti6Al4V 复合材料的热压缩特性
DOI：
10.1016/j.msea.2013.05.039
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发表时间：
2013-09-15
期刊：
影响因子：
6.4
通讯作者：
Ren, W.
中科院分区：
文献类型：
--
作者：
Huang, L. J.;Zhang, Y. Z.;Ren, W.
为提高钛基复合材料的力学性能，采用新型网络组织制备了原位TiB晶须增强Ti6 Al 4V（TiBw/Ti64）复合材料。复合材料的热压缩变形在900-1100 ℃的温度范围和0.001-10 s（-1）的应变速率范围内进行。基于动态材料模型（DMM），利用压缩数据构建了复合材料的加工图。根据加工图确定了最佳变形状态和失稳变形状态。压缩试样的显微组织可分为非变形区Ⅰ、过渡变形区Ⅱ、均匀变形区Ⅲ和环向变形区Ⅳ。与峰值效率相对应的热变形与TiBw增强相结合，促进了α相的动态再结晶（DRX）。此外，网络结构TiBw/Ti64复合材料的失稳特征表现为脱粘、开裂、流动局部化带和薄的均匀变形区。皇冠版权所有（C）2013由爱思唯尔B. V.出版保留所有权利。
As a success to improve mechanical properties of titanium matrix composites (TMCs), in situ TiB whiskers reinforced Ti6Al4V (TiBw/Ti64) composites were fabricated by tailoring a novel network microstructure. The hot compressive deformation of the composites was preformed in the temperature range of 900-1100 degrees C and a strain rate range of 0.001-10 s(-1). The processing maps of the composites are constructed using the compression data based on the dynamic material model (DMM). The optimal deformation regime and the instable deformation regime are established by the processing maps. The microstructure of compressed specimen can be divided into non-deformation region I, transition deformation region II, homogenous deformation region III and circum deformation region IV. Hot deformation corresponding with peak efficiency combined with TiBw reinforcement encourages dynamic recrystallization (DRX) of a phase. Additionally, the instable characteristics of the network structured TiBw/Ti64 composites can be expressed as debonding, cracking, flow localization band and thin homogenous deformation region. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.