کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1578131 1514814 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fracture toughness and low cycle fatigue behaviour in boron modified Timetal 834 titanium alloy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Fracture toughness and low cycle fatigue behaviour in boron modified Timetal 834 titanium alloy
چکیده انگلیسی

The effect of addition of 0.2 wt.% B to Timetal 834 alloy on the fracture toughness at room temperature and low cycle fatigue (LCF) behaviour at room temperature and 600 °C was studied in the thermomechanically processed condition after subjecting it to a standard heat treatment. The fracture toughness of the boron modified alloy was found to be only marginally lower than that of the base alloy in both L–T and T–L orientations. Both the B modified Timetal 834 alloy and the base alloy exhibited cyclic softening throughout their fatigue life at a total strain amplitude of 1.0% for LCF tests at room temperature and 600 °C. The fatigue life of the B modified Timetal 834 alloy was also found to be nearly same as that of the base alloy at both room temperature and 600 °C. The observed behaviour was attributed to the fact that the microstructure of the matrix alloy remains unaffected by the addition of 0.2 wt.% B in the thermomechanically processed and heat treated condition except for the presence of about 0.015 volume fraction of TiB whiskers and this results in similar deformation and fracture mechanisms in the base and boron modified Timetal 834 alloys.


► B modified Timetal 834 alloy showed lower fracture toughness than base alloy.
► B modified Timetal 834 alloy showed nearly same LCF life as base alloy.
► Both the alloys showed cyclic softening at 600 °C.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 529, 25 November 2011, Pages 74–80
نویسندگان
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