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

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,