Influences of particle fraction and characteristics on damage tolerance of TiB2-reinforced steel matrix composites
Influences of particle fraction and characteristics on damage tolerance of TiB2-reinforced steel matrix composites
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颗粒分数和特性对TiB2增强钢基复合材料损伤容限的影响
DOI：
10.1016/j.msea.2021.141736
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发表时间：
2021-08
期刊：
影响因子：
6.4
通讯作者：
Huang Mingxin
中科院分区：
文献类型：
--
作者：
Chen Ronghua;Li Bochuan;Li Yizhuang;Wang Xiaogang;Jiang Chao;Huang Mingxin
研究了不同体积分数TiB2陶瓷相增强的两种钢基复合材料的变形行为。当TiB2的体积分数从9%增加到13%时，SMC的拉伸强度意外下降，但塑性有所改善。在原位和非原位显微结构分析的基础上进行了深入的实验研究，以揭示其潜在的机制。结果表明，随着TiB2体积分数的增加，制备SMC的热轧过程中不可避免地会产生更多尺寸较大、界面空洞较多的一次TiB2颗粒。由于应力集中程度较高，初生TiB2颗粒容易过早断裂，界面空洞会加速微裂纹的形成和聚合，导致抗拉强度下降。TiB_2-13%SMC抗拉强度的下降也归因于铁素体基体的硬度，因为它的低孔隙率和大量的第二相含量。在塑性方面，TiB2-13%SMC优于TiB2-9%SMC，这是因为前者在初生TiB2颗粒周围有更干净的铁素体。
The deformation behaviours of two steel matrix composites (SMCs) strengthened by different volume fractions of the TiB2ceramic phase were investigated in this work. When the volume fraction of TiB2was increased from 9 vol% to 13 vol%, the SMC exhibited an unexpected decrease in tensile strength but an improvement in ductility. Thorough experimental investigations based on in-situ and ex-situ microstructural analyses were conducted to reveal the underlying mechanisms. These showed that increasing the volume fraction of TiB2inevitably led to more primary TiB2particles with larger sizes and considerable interfacial voids as a result of the hot rolling used in the preparation of the SMC. The primary TiB2particles were prone to premature fracture owing to higher stress concentrations, and interfacial voids could accelerate the process of microcrack formation and coalescence, leading to a decrease in tensile strength. Such a decrease in the tensile strength of the TiB2-13 vol% SMC was also attributed to the hardness of the ferrite matrix resulting from its low porosity and large secondary phase content. In terms of ductility, the TiB2-13 vol% SMC outperformed the TiB2-9 vol% SMC because the former possessed cleaner ferrite surrounding the primary TiB2particles.
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揭示 TiB2 增强钢基复合材料的疲劳裂纹萌生机制
影响因子：
6
作者：
Chen rong hua;Li bo chuan;Li yi zhuang;Liu zhi cheng;Long xiang yun;Yi hong liang;Wang xiao gang;Jiang chao;Huang min xin
通讯作者：
Huang min xin
影响因子：
2.2
作者：
Z. Hadjem-Hamouche;J. Chevalier;Yi-xiang Cui;F. Bonnet
通讯作者：
Z. Hadjem-Hamouche;J. Chevalier;Yi-xiang Cui;F. Bonnet
DOI：
10.1016/s1003-6326(09)60040-6
发表时间：
2009-12-01
影响因子：
4.5
作者：
Song Min
通讯作者：
Song Min
影响因子：
5.2
作者：
Ningjuan Wu;Fengdan Xue;Hailin Yang;Guoping Li;F. Luo;J. Ruan
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Ningjuan Wu;Fengdan Xue;Hailin Yang;Guoping Li;F. Luo;J. Ruan
DOI：
10.1016/s0921-5093(02)00593-2
发表时间：
2003-04-25
影响因子：
6.4
作者：
Hong, SJ;Kim, HM;Chun, BS
通讯作者：
Chun, BS