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基于SPS-熱軋法鎢顆粒增強(qiáng)鋁基復(fù)合材料微觀組織及力學(xué)性能研究
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1.太原理工大學(xué)機(jī)械與運(yùn)載工程學(xué)院 太原;2.太原理工大學(xué)

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Microstructures and mechanical properties of tungsten particle reinforced 6061Al composites fabricated by SPS and hot rolling
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1.College of Mechanical and Vehicle Engineering,Taiyuan University of Technology;2.College of Materials Science and Engineering,Taiyuan University of Technology

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    摘要:

    本文采用放電等離子燒結(jié)→熱軋制方法制備了顆粒含量為1~7%的鎢顆粒增強(qiáng)鋁基復(fù)合材料,研究鎢顆粒含量對(duì)復(fù)合材料的微觀組織、機(jī)械性能和導(dǎo)電性能的影響。研究結(jié)果表明:鎢顆粒均勻的分布在基體鋁合金當(dāng)中,W/Al界面之間達(dá)到了冶金結(jié)合,在界面處存在元素?cái)U(kuò)散和WAl12金屬間化合物的生成。在復(fù)合材料中,隨著鎢顆粒含量的增加,復(fù)合材料的致密度和韌性降低而拉伸強(qiáng)度呈現(xiàn)先升高后降低的趨勢(shì)。其中,1和3 vol.% W/Al復(fù)合材料的拉伸強(qiáng)度和斷裂韌性分別為192.85 MPa (16.84%) 和315.18 MPa (11.93%)。此外,W/Al復(fù)合材料具有良好的電導(dǎo)率,W顆粒的含量對(duì)復(fù)合材料的影響較小。

    Abstract:

    In this study, tungsten particle (Wp) reinforced 6061Al matrix composites with different volume fractions (1~7%) were fabricated by spark plasma sintering (SPS) followed by hot-rolling. The effects of Wp content on the microstructure, mechanical properties and electrical resistivity of the as-rolled composites were investigated. The results show that the W particles were homogeneously distributed in the metal matrix, achieving excellent metallurgical bonding. At the interface of Wp/6061Al, element solid solution and WAl12 intermetallics were formed during the fabrication process. The mechanical test results show that, with the increase of W volume fraction, relative density and ductility of the as-rolled composites decreased while the tensile strength first increased and then decreased. It is noteworthy that both high tensile strength and ductility were obtained by the composites with 1 and 3 vol.% Wp, being 192.85 MPa ,16.84% and 315.18 MPa ,11.93%, respectively. Besides, the fabricated Wp reinforced 6061Al matrix composites had excellent electrical conductivity and the increase of Wp content had a little influence on the electrical conductivity.

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楊濤,陳洪勝,王文先,張宇陽(yáng),劉潤(rùn)峰.基于SPS-熱軋法鎢顆粒增強(qiáng)鋁基復(fù)合材料微觀組織及力學(xué)性能研究[J].稀有金屬材料與工程,2020,49(11):3702~3708.[Yang Tao, Chen Hongsheng, Wang Wenxian, Zhang Yuyang, Liu Ruifeng. Microstructures and mechanical properties of tungsten particle reinforced 6061Al composites fabricated by SPS and hot rolling[J]. Rare Metal Materials and Engineering,2020,49(11):3702~3708.]
DOI:10.12442/j. issn.1002-185X.20191065

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  • 收稿日期:2019-12-17
  • 最后修改日期:2020-01-21
  • 錄用日期:2020-02-20
  • 在線(xiàn)發(fā)布日期: 2020-12-09
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