کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
815268 906323 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optimization of Microstructure and Elimination of β(B2) Phase in As-Cast Ti-Al-Nb-W-B Alloy
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک مواد
پیش نمایش صفحه اول مقاله
Optimization of Microstructure and Elimination of β(B2) Phase in As-Cast Ti-Al-Nb-W-B Alloy
چکیده انگلیسی

The microstructures of as-cast Ti-Al-Nb-W-B alloy were investigated to assess the possibility of eliminating the triaxial β(B2) phase on the crystal boundary through heat treatment and multi-step forging thermal mechanical treatment. The microstructure evolution and growth mechanism were studied according to Ti-Al-Nb ternary phase diagram, and then the process of eliminating of the triaxial β(B2) phase on the crystal boundary was assessed. The results of the experiments indicate that the best way to eliminate β(B2) phase is holding at the 1260 °C for 8 h or 1220 °C for 36 h followed by furnace cooling, but the grains grow appreciably. On the other hand, after multi-step forging with a total deformation of more than 80%, the as-cast nearly lamellar structure can be refined obviously to the duplex microstructure, and the β(B2) phase is basically eliminated.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Rare Metal Materials and Engineering - Volume 38, Issue 10, October 2009, Pages 1711-1717