Achieving Superior Strength and Ductility Combination Through Cryorolling in 2219 Aluminum Alloy

Sivaprasad K.; Blessto B.; Muthupandi V.; Arumugam M.

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Achieving Superior Strength and Ductility Combination Through Cryorolling in 2219 Aluminum Alloy

机译：通过2219铝合金的低温实现优异的强度和延性组合

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摘要

In aluminum 2219 alloy, a combination of ultra-fine grains and coarse grains was established through cryorolling. Formation of bimodal grain distribution was confirmed using electron backscattered diffraction analysis, transmission electron microscopy and x-ray diffraction analysis. Cryorolled samples showed a 3% increase in strength, with a 4% increase in ductility. An increase in dislocation density, reduced slip distance and bimodal grain structure were attributed to the strength-ductility combination. Dislocation annihilation rate and driving force for dislocation movement were also determined based on the temperature of deformation and dislocation density in rolled material. The unidirectional and cross-directional cryorolled samples resulted in a grain size ranging from 510 nm to 73 mu m and 340 nm to 42 mu m, respectively.

机译：在铝2219合金中，通过低温轧制形成了超细晶粒和粗晶粒的组合。利用电子背散射衍射分析、透射电子显微镜和x射线衍射分析证实了双峰晶粒分布的形成。冷轧试样的强度增加了3%，延展性增加了4%。位错密度的增加、滑移距离的减小和双峰晶粒结构的形成归因于强度-塑性组合。根据轧制材料的变形温度和位错密度，确定了位错湮灭速率和位错运动驱动力。单向和横向冷轧样品的晶粒尺寸分别为510 nm至73μm和340 nm至42μm。

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来源
《Journal of Materials Engineering and Performance》 |2020年第10期|共9页
作者
Sivaprasad K.; Blessto B.; Muthupandi V.; Arumugam M.;
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作者单位

Natl Inst Technol Adv Mat Proc Lab Dept Met &

Mat Engn Tiruchirappalli 620015 India;

Natl Inst Technol Adv Mat Proc Lab Dept Met &

Mat Engn Tiruchirappalli 620015 India;

Natl Inst Technol Adv Mat Proc Lab Dept Met &

Mat Engn Tiruchirappalli 620015 India;

Liquid Prop Syst Ctr Thiruvananthapuram 695547 India;

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原文格式 PDF
正文语种 eng
中图分类金属学与金属工艺;工程材料学;
关键词
AA2219; aluminum; cryorolling; dislocation annihilation rate; microstructure; rolling; texture;

机译：AA2219;铝低温轧制;位错湮灭率;微观结构;滚动的;纹理;

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Achieving Superior Strength and Ductility Combination Through Cryorolling in 2219 Aluminum Alloy

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