کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7176453 | 1466712 | 2018 | 27 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Grain refinement of pure Al using Al2.5Cu0.5Ti particles with an L12 structure
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی صنعتی و تولید
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this study, an L12-modified Al2.5Cu0.5Ti intermetallic compound was chosen as a heterogeneous nucleation site to develop grain refiners for cast Al with a high volume fraction of heterogeneous nucleation site particles. Al2.5Cu0.5Ti intermetallic compound particles with an L12 structure were prepared by crushing the bulk material obtained by arc melting or directly by gas atomization. Al-10â¯vol% Al2.5Cu0.5Ti, Al-20â¯vol% Al2.5Cu0.5Ti, Al-30â¯vol% Al2.5Cu0.5Ti and Al-40â¯vol% Al2.5Cu0.5Ti refiners were fabricated by the spark plasma sintering method. The grain refining performance of the fabricated refiners for pure cast Al was investigated. It was found that fabricated Al-Al2.5Cu0.5Ti refiners were effective grain refiners for cast Al because Al2.5Cu0.5Ti particles with the L12 structure act as nuclei for Al grains in Al melts. Different refining performance characteristics appeared for refiners with different volume fraction of heterogeneous nucleation site particles, even though the total amount of particles in the melt was the same. Moreover, superior grain refining efficiency was obtained for the Al2.5Cu0.5Ti particles having a single phase than those with secondary phase. This is because the lattice matching between heterogeneous nucleation site particles and solidified Al is critical to obtain finer grain structures for Al casts.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Processing Technology - Volume 255, May 2018, Pages 400-410
Journal: Journal of Materials Processing Technology - Volume 255, May 2018, Pages 400-410
نویسندگان
Yoshimi Watanabe, Ryosuke Yamazaki, Kunika Yamanaka, Hisashi Sato,