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ECAP变形过程中θ′相的碎化及溶解行为分析 被引量:4

Behavior of Fragmentation and Dissolution ofθ′Phase During ECAP Pressing
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摘要 研究了Al-Cu二元合金的θ′相在ECAP强变形中的碎化及溶解行为。X射线衍射分析表明,ECAP变形至8道次时θ′的衍射峰消失。透射电镜观察表明,在切应力作用下θ′相发生弯曲变形,内部形成了位错墙、亚晶、剪切带及扭转带结构。θ′相首先在亚晶界面、剪切带及扭转带与基体的界面结合处发生溶解,继而断裂碎化及球化,并逐渐发生分解溶入基体。分析表明,θ′相在强变形中的碎化和溶解主要是由其自身的应变引起的,而并非碎化后的表面能升高。 The behavior of fragmentation and dissolution of θ′ phase during ECAP severe plastic deformation has been investigated. The X-ray diffraction result showed that diffraction peak corresponding to θ′ phase disappeared after samples underwent 8 passes of ECAP deformation. The results of TEM observation suggested that under the action of shear stress created in ECAP deformation bending deformation of θ′ phase started to occur, by which a series of microstructure such as dislocation wall, subgrain boundary, shear band and torsion band structure were formed in θ′ phase. The dissolution of θ′ phase in matrix preferentially occurs at the junction point between subgrain boundary, shear band, torsion band structure and matrix. Subsequently θ′ phase was fragmentated into chain-shaped, sphericized particles and gradually decomposed to dissolve in matrix. It is indicated that the fragmentation and dissolution of θ′ phase during ECAP severe plastic deformation are mainly caused by raise of strain energy in θ′ phase instead of surface energy caused by fragmentation of θ′ phase.
机构地区 邵阳学院 中南大学
出处 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2008年第11期1930-1933,共4页 Rare Metal Materials and Engineering
基金 国家自然科学基金项目(50571069) 湖南省教育厅重点项目(05A061)资助
关键词 ECAP θ′相 溶解 铝合金 ECAP θ′phase dissolution aluminum alloy
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参考文献15

  • 1Valiev R Z, Islamgaliev R K, Alexandrov I V. Prog Mater Sci[J], 2000, 45:103
  • 2Liu Yong(刘咏),Tang Zhihong(唐志宏),Zhou Kezhao(周科朝)et al.中国有色金属学报[J],2003,13(1):21
  • 3许晓嫦,刘志义,党朋,谭曼玲.强塑性变形(SPD)制备超细晶粒材料的研究现状与发展趋势[J].材料导报,2005,19(1):1-5. 被引量:11
  • 4Semiatin S L, Berbon P B, Langdon T G. Scripta Mater[J], 2001, 44:135
  • 5Ohishi Y, Hashi Y, Sadakata K et al. Mater Sci Forum[J], 2002, 395-402:333
  • 6Gao N, Davin L, Wang Set al. Mater Sci Forum[J], 2002, 396-402:923
  • 7Alexandrov I V, Zhu Y T, Lowe T C et al. Nano Structured Material[J], 1998, 110(1): 45
  • 8Heason C P, Prangnell P B. Mater Sci Forum[J], 2002, 396-402:429
  • 9Tsuji N, Lto Y, Nakashima H et al. Mater Sci Forum[J], 2002, 396-402:423
  • 10Kang S B, Lim C Y, Kim H W et al. Mater Sci Forum[J], 2002, 396,--402:1163

二级参考文献46

  • 1穴田博 田中严.轻金属,2003,:53-53,20.
  • 2高山善匡 西乡宜恭.轻金属,2002,52(11):566-566.
  • 3野田雅史 广桥光治.日本金属学会志,2002,66(2):101-101.
  • 4野田雅史 广桥光治.日本金属学会志,2003,67(2):98-98.
  • 5吉水源宏 桑原利彦.轻金属,2003,53(7):284-284.
  • 6崔祺 大崛榕一.轻金属,2002,52(4):185-185.
  • 7古井光明 川上贵之 佐治重兴.轻金属,2002,52(8):339-339.
  • 8Ma A, Lim S W, Nishiha Y. Mater Sci Forum,2003,(426-432) : 2735.
  • 9Stolyaror V V, Zhu Y T, Lower T C. Mater Sci Eng,2001,A303:82.
  • 10Stolyaror V V, Zhu Y T, Alexandror I V. Mater Sci Eng,2003,A343: 43.

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