کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5450371 1398500 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of withdrawal rate on the porosity in a third-generation Ni-based single crystal superalloy
ترجمه فارسی عنوان
تأثیر میزان خروج بر تخلخل در یک نسل سوم ابررسانای تک کریستالی مبتنی بر نیکل
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
چکیده انگلیسی
The influence of withdrawal rate on the porosity in a third-generation Ni-based single crystal superalloy was investigated by a quantitative evaluation method. The results showed that the withdrawal rate obviously effected on the average area fraction, number and diameter of porosities except their radius ratios. In consideration of the microstructure observation for dendrite arms, an optimized withdrawal rate was obtained with a minimum porosity level as about 125 µm s−1. Simultaneously, a threshold value for the acceptance level of porosities might be set as about 0.1% in order to fulfill the requirements for Ni-based single crystal casting in laboratory scale. Finally, the formation reason of porosity was discussed and it was concluded that the feeding for the volume shrinkage of the last solidified eutectic liquids from the residual liquids and the isolating effect of the morphologies of dendrite arms might be two key factors in controlling the porosities level in Ni-based single crystal superalloy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Progress in Natural Science: Materials International - Volume 27, Issue 2, April 2017, Pages 236-243
نویسندگان
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