Recrystallization and fatigue fracture of single crystal turbine blades

被引：26

作者：

He, Y. H. ^{[1
]}

Hou, X. Q. ^{[1
]}

Tao, C. H. ^{[1
]}

Han, F. K. ^{[2
]}

机构：

[1] Beijing Inst Aeronaut Mat, AVIC Failure Anal Ctr, Beijing 100095, Peoples R China

[2] Cent Iron & Steel Res Inst, Dept Superalloys, Beijing 100081, Peoples R China

来源：

ENGINEERING FAILURE ANALYSIS | 2011年 / 18卷 / 03期

关键词：

Single crystal superalloy; Recrystallization; Blade; Fatigue failure;

D O I：

10.1016/j.engfailanal.2010.11.012

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Two rotor blades in an aero-engine fractured during testing. The fracture mode and cause were analyzed on the basis of fracture surface observation, chemical analysis, and metallurgical structure examination. The results show that the two blades failed in the same mode - fatigue fracture caused by recrystallization. In order to find out the cause of recrystallization, simulation tests were carried out by grit blasting and solution heat treatment. It is found that recrystallization formed during solution treatment because of the plastic deformation by grit blasting, and with the increase of the pressure and time for grit blasting, the depth of the recrystallized layer went up. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：944 / 949

页数：6

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