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International Journal of Engineering، جلد ۲۴، شماره ۲، صفحات ۱۲۳-۱۳۰
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عنوان انگلیسی Synthesis of Nanostructure Ti-45Al-5Cr Alloy by Mechanical Alloying and Study the Effect of Cr Addition on Microstructure of TiAl Alloy
چکیده انگلیسی مقاله In this work, mechanical alloying was employed to produce Ti-50Al and Ti-45Al-5Cr (at%) alloys. Alloying was performed in a planetary mill and the alloying time varying from 5 to 70h. Characterization of the powder mixture was performed by X-ray diffraction (XRD), SEM analyses and DTA test, during mechanical alloying and after annealing at 1100°c in vacuum oven. The results showed, after 50h of milling of TiAl powder mixture, only a complete amorphous phase was detected but with Cr addition (5at%) the Cr (Ti,Al) solid solution within the amorphous matrix were identified. After annealed of mechanically alloyed Ti-50Al for 50h, the γ-phase with high purity and nanostructured size was produced but for sample with Cr addition, TiAl(γ) and amount of Ti3Al(alpha2) were detected. Cr accelerated the production of duplex structure (gamma+alpha2). It suggested the Cr(Ti,Al) solid solution was dissolved in TiAl(gamma) and Ti3Al(alpha2).
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نویسندگان مقاله Rasoul Azazari.khosroshahi |
, Sahand Univ. of Technology

Farshad Abbasi Nargesi |
Materials and Metallurgical Engineering Department, Sahand Univ. of Technology

Naghi Parvini.ahmadi |
Materials Eng., Sahand University of Technology

نشانی اینترنتی http://www.ije.ir/article_71898_21fccba5f3ee974387c9075597c7cba7.pdf
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/409/article-409-2417078.pdf
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زبان مقاله منتشر شده en
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