Effects of volume fraction on the microstructure and tensile properties of in situ TiBw/Ti6Al4V composites with novel network microstructure
Effects of volume fraction on the microstructure and tensile properties of in situ TiBw/Ti6Al4V composites with novel network microstructure
复制标题
体积分数对新型网络结构原位TiBw/Ti6Al4V复合材料显微组织和拉伸性能的影响
DOI：
10.1016/j.matdes.2012.09.043
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发表时间：
2013-03-01
影响因子：
8.4
通讯作者：
Wu, L. Z.
中科院分区：
文献类型：
--
作者：
Huang, L. J.;Geng, L.;Wu, L. Z.
为了更好地了解TiBw/Ti6Al4V(TiBw/Ti64)复合材料的组织-力学性能与网络组织的关系，并推导出TiBw体积分数的上限，进一步研究了体积分数对TiBw/Ti6Al4V(TiBw/Ti64)复合材料组织和拉伸性能的影响。推导了具有网状组织的复合材料最佳和最大增强体积率的计算公式。通过计算、微观结构观察、拉伸性能测试，确定了该体系的最佳体积分数为5.1%，最大体积分数为10.2%。当体积分数等于或低于5.1vol.%时，形成粗大的TiBw，否则形成细小的TiBw、簇状TiBw和块状TiBw，甚至形成未愈合的气孔。随着TiBw体积分数的增加，TiBw/Ti64复合材料的抗拉强度先增加后急速下降，塑性持续下降。皇冠版权所有(C)2012由爱思唯尔有限公司出版。保留所有权利。
In order to better understand the relationship of structure-mechanical properties of TiBw/Ti6Al4V (TiBw/Ti64) composites with a network microstructure and deduce the upper limit of TiBw volume fraction, the effects of volume fraction on the microstructure and tensile properties were further investigated. The equation calculating the optimal and maximum volume fractions of reinforcement for the composites with a network microstructure was deduced. For the present system, the optimal and maximum volume fractions were verified to be 5.1 vol.% and 10.2 vol.%, respectively, by calculation, microstructure observation, tensile properties. When the volume fraction was equal and lower than 5.1 vol.%, the coarse TiBw formed, or else, the fine TiBw, the cluster TiBw and the block TiBw, even unhealed pores formed. The tensile strength of TiBw/Ti64 composites increases and then hastily decreases, while the ductility keeps on decreasing with increasing volume fractions of TiBw reinforcement. Crown Copyright (C) 2012 Published by Elsevier Ltd. All rights reserved.