کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5455171 | 1514637 | 2017 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural refinement and nanomechanical response of laser remelted Al-Al2Cu lamellar eutectic
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Structural refinement and nanomechanical response of laser remelted Al-Al2Cu lamellar eutectic Structural refinement and nanomechanical response of laser remelted Al-Al2Cu lamellar eutectic](/preview/png/5455171.png)
چکیده انگلیسی
Laser remelting was employed to refine the interlamellar spacing (λ) to approximately 30 nm on an arc-cast Al-32.7 wt%Cu eutectic. λ scaled with A â²(h)-°0.25 where h is the distance from the trace bottom, and A â² is a factor dependent on laser processing conditions. Aâ² increased with the laser power (at a constant spot diameter) but decreased with the spot diameter (at a constant laser power). The nanoindentation measured hardness increased up to 4.68 GPa with decreasing interlamellar spacing, following the Hall-Petch relation. The as-cast eutectics showed microcracks around indents, while cracking was suppressed in the laser remelted nanoscale eutectics. A dislocation theory based mechanism is proposed for the enhanced plastic co-deformation of fine scale laser-remelted Al-Al2Cu eutectics.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 706, 26 October 2017, Pages 115-125
Journal: Materials Science and Engineering: A - Volume 706, 26 October 2017, Pages 115-125
نویسندگان
Qian Lei, Bhupendera Prashanth Ramakrishnan, Shujuan Wang, Yichen Wang, Jyotirmoy Mazumder, Amit Misra,