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軋制變形量對GNPs/Ti復合材料組織與性能的影響
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北京理工大學材料學院沖擊環(huán)境材料技術(shù)國家級重點實驗室,北京理工大學材料學院沖擊環(huán)境材料技術(shù)國家級重點實驗室,北京理工大學材料學院沖擊環(huán)境材料技術(shù)國家級重點實驗室,北京理工大學材料學院沖擊環(huán)境材料技術(shù)國家級重點實驗室,北京理工大學材料學院沖擊環(huán)境材料技術(shù)國家級重點實驗室

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Effects of Hot-rolling Reduction on Microstructure and Mechanical Properties of GNPs/Ti Composites
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National Key Laboratory of Science and Technology on Materials under Shock and Impact,School of Materials Science and Engineering,Beijing Institute of Technology,National Key Laboratory of Science and Technology on Materials under Shock and Impact,School of Materials Science and Engineering,Beijing Institute of Technology,National Key Laboratory of Science and Technology on Materials under Shock and Impact,School of Materials Science and Engineering,Beijing Institute of Technology,National Key Laboratory of Science and Technology on Materials under Shock and Impact,School of Materials Science and Engineering,Beijing Institute of Technology,National Key Laboratory of Science and Technology on Materials under Shock and Impact,School of Materials Science and Engineering,Beijing Institute of Technology

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    摘要:

    本文采用放電等離子燒結(jié)技術(shù)(SPS)和熱軋制備了石墨烯/鈦基復合材料(GNPs/Ti)。重點研究了軋制變形量對GNPs/Ti復合材料的顯微組織及力學性能的影響規(guī)律。采用掃描電鏡觀察不同變形量后的顯微組織,結(jié)果顯示,隨著軋制變形量的增加,基體晶粒長徑比增大,石墨烯取向性提高。拉伸結(jié)果表明,GNPs/Ti復合材料的抗拉強度和斷后伸長率隨著變形量的增加而增加,最大抗拉強度達到680MPa,相比純鈦提高了33%。采用軋制工藝可以使GNPs/Ti復合材料孔洞減少、GNPs分布具有取向性,從而提高材料的力學性能。

    Abstract:

    Graphene nanoplatelets (GNPs)/Ti composites were fabricated by spark plasma sintering (SPS) and hot-rolling. This work was focused on the effects of rolling reduction on microstructure and mechanical properties of GNPs/Ti composites. The SEM microstructure results showed that matrix grains were gradually elongated and the amount of GNPs which were along the rolling direction rose with the increase of rolling reduction. The tensile test results show that the ultimate tensile strength and fracture elongation of the GNPs/Ti composites increase with the increase of rolling reduction. The ultimate tensile strength of the composites with 60% rolling reduction is 680MPa, which is increased by 33% compared with pure Ti. Hot-rolling process can relieve defects and lead to GNPs aligned along the rolling direction, which contribute to the improvement of the tensile property.

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吳焰,張洪梅,才鴻年,范群波,穆嘯楠.軋制變形量對GNPs/Ti復合材料組織與性能的影響[J].稀有金屬材料與工程,2018,47(8):2312~2317.[Wu Yan, Zhang Hongmei, Cai Hongnian, Fan Qunbo, Mu Xiaonan. Effects of Hot-rolling Reduction on Microstructure and Mechanical Properties of GNPs/Ti Composites[J]. Rare Metal Materials and Engineering,2018,47(8):2312~2317.]
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  • 收稿日期:2017-01-17
  • 最后修改日期:2017-05-09
  • 錄用日期:2017-05-16
  • 在線發(fā)布日期: 2018-10-17
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