首页> 外文会议>Materials Science Technology Conference and Exhibition >THE INFLUENCE OF NANO TiN ADDITIONS ON MECHANICAL PROPERTIES AND FRACTURE BEHAVIOUR OF SPARK PLASMA SINTERED SAF 2205
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THE INFLUENCE OF NANO TiN ADDITIONS ON MECHANICAL PROPERTIES AND FRACTURE BEHAVIOUR OF SPARK PLASMA SINTERED SAF 2205

机译:纳米锡添加对火花等离子体烧结SAF 2205机械性能和断裂行为的影响

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The influences of TiN additions on microstructure, mechanical properties and fracture behaviour of the SAF 2205-TiN composites were investigated. Automated spark plasma sintering machine (model HHPD-25, FCT GmbH Germany) was used to fabricate the composites. Characterization was performed using Scanning Electron Microscopy. Archimedes principle was used to evaluate the densities of the composites. Hardness (H) and elastic modulus (E) were investigated by nanoindentation using load 1 mN. The results obtained indicated that SPS process parameters were optimized at 1150 °C, 15 min and 100 °C/min. The microstructure revealed that the TiN particles have a general tendency to segregate at the grain boundaries. The hardness (H) and elastic modulus (E) values increased with TiN contents due to the hardening and stiffening effects of the TiN reinforcements. With increase in TiN content, the dimples on the fracture surfaces of the composites reduced drastically with only faint traces of the dimples left. A combination of ductile and brittle fractures is prevalent in the 6 and 8 % TiN.
机译:研究了锡添加对SAF 2205-锡复合材料的微观结构,机械性能和断裂行为的影响。自动化火花等离子烧结机(型号HHPD-25,FCT GmbH德国)用于制造复合材料。使用扫描电子显微镜进行表征。 Archimedes原理用于评估复合材料的密度。通过使用负载1mN的纳米indentation研究硬度(H)和弹性模量(e)。得到的结果表明,SPS工艺参数在1150℃,15分钟和100℃/ min下进行优化。微观结构显示锡颗粒具有在晶界处隔离的一般倾向。由于锡增强件的硬化和加强效应,硬度(H)和弹性模量(e)值随锡含量而增加。随着锡含量的增加,复合材料的断裂表面上的凹坑大幅减少,只有剩下的微弱迹线。延性和脆性骨折的组合在6%锡中普遍存在。

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