کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1572702 1000697 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characterization of intermetallic precipitates in a Nimonic alloy by ultrasonic velocity measurements
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Characterization of intermetallic precipitates in a Nimonic alloy by ultrasonic velocity measurements
چکیده انگلیسی

Ultrasonic velocity measurements have been carried out in Nimonic 263 specimens thermally aged at 923 and 1073 K for durations up to 75 h and correlated with the results of hardness measurements and electron microscopy studies. The ultrasonic velocities and hardness results obtained in the specimens thermally aged at both temperatures clearly indicated that ultrasonic velocity is more sensitive to the initiation of the precipitation, whereas the influence of precipitation on hardness can be observed only after the precipitates attain a minimum size to influence the movement of dislocations. Further, ultrasonic velocity measurements also revealed faster kinetics and a lesser amount of precipitation at 1073 K compared to 923 K due to higher solubility of precipitate-forming elements.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Characterization - Volume 60, Issue 3, March 2009, Pages 234–239
نویسندگان
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