کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1577232 1514794 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The deformation instability and stability analysis of Ti-17 powder compact during thermo-mechanical processing
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
The deformation instability and stability analysis of Ti-17 powder compact during thermo-mechanical processing
چکیده انگلیسی

The deformation instability and stability of Ti–5Al–2Sn–2Zr–4Mo–4Cr (Ti-17) powder compact prepared through argon atomization and hot isostatic pressing was characterized using hot processing map. Based on hot compression experiments, the hot processing map of Ti-17 powder compact was established at temperatures from 810 °C to 920 °C and strain rates from 0.001 s−1 to 1 s−1. The deformation instability and stability regions of Ti-17 powder compact under different deformation conditions were identified. The deformation instability regions mainly focuses at temperatures from 817 °C to 927 °C and strain rates from 0.05 s−1 to 1 s−1, in which the maximum efficiency of power dissipation just reaches 0.35. The instability manifestations in adopted deformation conditions mainly are local large deformation, inhomogeneous deformation, internal crack, and deformation heating. The peak efficiency of power dissipation with the value of 0.6 in deformation stability regions corresponds to large dynamic recrystallization. The different efficiency of power dissipation in deformation stability regions could be used as a basis for selecting proper thermo-mechanical processing parameters to obtain different microstructure morphology according to the performance of the material.


► Deformation instability and stability region of Ti-17 powder compact were identified.
► Deformation instability and stability manifestations of powder compact were analyzed.
► Thermo-mechanical processing can be conducted in deformation stability regions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 549, 15 July 2012, Pages 193–199
نویسندگان
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