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
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کلمات کلیدی
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 sâ1. 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
Journal: Progress in Natural Science: Materials International - Volume 27, Issue 2, April 2017, Pages 236-243
نویسندگان
Quanzhao Yue, Lin Liu, Wenchao Yang, Taiwen Huang, Jun Zhang, Hengzhi Fu, Xinbao Zhao,