کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1637814 | 1517027 | 2010 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characterization of deformation stability of in-situ TiB2/6351 composites during hot compression based on Murty criterion
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In situ TiB2 reinforced 6351 Al alloy composites were subjected to compression testing at strain rates and temperatures ranging from 0.001 to 10 sâ1 and from 300 to 550°C, respectively, using Gleebleâ1500D system. And the associated microstructural transformations and instability phenomena were studied by observations of the optical and transmission electron microscope. The power dissipation efficiency and instability parameter were calculated following the dynamic material model and plotted with the temperature and logarithm of strain rate to obtain processing maps for strains of 0.2, 0.4, and 0.6. The processing maps present the instability zones at higher strain rates. The result shows that with increasing strain, the instability zones enlarge. The microstructural examination shows that the interface separates even the particle cracks or aligns along the shear direction of the adiabatic shear band in the instability zones. Two domains of higher efficiencies correspond to dynamic recovery and dynamic recrystallization during the hot deformation. Using the processing maps, the optimum processing parameters of stain rates and temperatures can be chosen for effective hot deformation of TiB2/6351 composites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Transactions of Nonferrous Metals Society of China - Volume 20, Issue 2, February 2010, Pages 267-275
Journal: Transactions of Nonferrous Metals Society of China - Volume 20, Issue 2, February 2010, Pages 267-275
نویسندگان
Sheng-li GUO, De-fu LI, Dong CHEN, Hao-wei WANG,