STRUCTURAL DEFECTS OF INITIAL CRYSTALLIZATION AREAS IN SINGLE-CRYSTALLINE TURBINE BLADES

被引：3
|
作者：
Krawczyk, J. [1 ]
Tondos, A. [1 ]
Bogdanowicz, W. [1 ]
Paszkowski, R. [1 ]
机构：
[1] Univ Silesia, Inst Mat Sci, Dept Crystalog, Chorzow, Poland
来源：
POWDER METALLURGY AND METAL CERAMICS | 2017年 / 56卷 / 7-8期
关键词：
CMSX-4; superalloy; single-crystalline turbine blades; structural defects; X-ray topography; SOLUTION HEAT-TREATMENT; SUPERALLOY;
D O I：
10.1007/s11106-017-9919-z
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The as-cast single-crystalline turbine blades made of CMSX-4 superalloy were studied. The blades were obtained by the Bridgman technique at a withdrawal rate of 5mm/min. The as-cast samples were prepared by cutting the blade root with a fragment of selector. The dendritic structure of obtained samples was studied by Scanning Electron Microscopy. The crystal orientation and lattice parameters were analyzed by Omega-scan mapping method. Additionally, the X-ray diffraction topography was applied. It was found that the most structural defects are created in the areas where a change in the shape and dimensions of the blades occur. Even minor changes in their geometry and the unevenness of mold walls may also affect the formation of defects.
引用
收藏
页码：481 / 486
页数：6
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