کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7951922 | 1513701 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of scanning speed on microstructure in laser surface-melted single crystal superalloy and theoretical analysis
ترجمه فارسی عنوان
اثرات سرعت اسکن بر روی ریزساختار در سوپرآلیاژ تک کریستال سرامیکی لیزر و تجزیه و تحلیل نظری
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
شیمی مواد
چکیده انگلیسی
Scanning speed is a critical parameter for laser process, which can play a key role in the microstructure evolution of laser melting. In the laser melting of single crystal superalloy, the effects of scanning speed were investigated by experimental analysis and computational simulation. The laser was scanning along [71¯0] direction on (001) surface in different speeds. Solidification microstructures of dendrites growth direction and the primary dendritic spacing were analyzed by metallograph. Besides, a planar interface during solidification was taken into attention. Experiment results indicated that the primary dendritic spacing and thickness of planar interface decrease with the increase of speed. Through simulation, distribution of dendrites growth velocity and thermal gradient along dendrite growth direction were calculated, and the simulation of dendrites growth direction agreed with the experiment results. Additionally, a constant value was acquired which can be used to predict the primary dendritic spacing. Moreover, according to curve-fitting method and inequality relation, a model was proposed to predict the thickness of planar interface.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Science & Technology - Volume 34, Issue 8, August 2018, Pages 1315-1324
Journal: Journal of Materials Science & Technology - Volume 34, Issue 8, August 2018, Pages 1315-1324
نویسندگان
Guowei Wang, Jingjing Liang, Yanhong Yang, Yu Shi, Yizhou Zhou, Tao Jin, Xiaofeng Sun,