標題: The influence of carbon addition on carbide characteristics and mechanical properties of CM-681LC superalloy using fine-grain process
作者: Wei, Chao-Nan
Bor, Hui-Yun
Chang, Li
材料科學與工程學系
Department of Materials Science and Engineering
關鍵字: High-temperature alloys;Fine-grain;Carbide;Mechanical properties
公開日期: 5-五月-2011
摘要: This study investigates how carbon addition affects the carbide characteristics and mechanical properties of CM-681LC nickel-base superalloy with grain size of 80 mu m prepared using the fine-grain process. Experimental results indicate that carbon addition from 0.11 wt% to 0.15 wt% greatly increases the amount of carbides, but the shape and size of carbides are similar due to the short solidification time of the fine-grain process, which limits the growth of carbides. The increase of carbides by proper carbon addition effectively improves the tensile strength by about 5% and the tensile elongation by over 30% at room and moderate temperatures (21-760 degrees C). The fracture analyses reveal that the carbon addition in fine-grain CM-681LC superalloy can changes the fracture modes from typical intergranular fracture modes to transgranular and intergranular mixed modes. The better carbon content of CM-681LC superalloy applied in the fine-grain process is 0.15 wt%, which has better mechanical properties. (C) 2011 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.jallcom.2011.02.146
http://hdl.handle.net/11536/8879
ISSN: 0925-8388
DOI: 10.1016/j.jallcom.2011.02.146
期刊: JOURNAL OF ALLOYS AND COMPOUNDS
Volume: 509
Issue: 18
起始頁: 5708
結束頁: 5714
顯示於類別:期刊論文


文件中的檔案:

  1. 000289374300049.pdf