Effect of beta flecks on mechanical properties of Ti-10V-2Fe-3A1 alloy

被引:33
作者
Zeng, WD [1 ]
Zhou, YG [1 ]
机构
[1] Northwestern Polytech Univ, Coll Mat Sci & Engn, Xian 710072, Shaanxi, Peoples R China
来源
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1999年 / 260卷 / 1-2期
关键词
Ti-10V-2Fe-3Al alloy; beta fleck; tensile property; low-cycle fatigue life; intergranular fracture; cleavage fracture;
D O I
10.1016/S0921-5093(98)00954-X
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The effects of beta flecks on tensile properties and low-cycle fatigue life were investigated at room temperature for Ti-10V-2Fe-3Al alloy. It was found that beta flecks had a significant influence on tensile ductility and low-cycle fatigue life. The greater the volume fraction of beta flecks (P-A) or maximum area of beta flecks (S-max), the lower the tensile ductility and low-cycle fatigue life. Extensive scanning electron microscopy (SEM) and light microscopy (LM) observation showed that under tensile load, cracks preferentially nucleated at beta grain boundaries of beta flecks, then grew, connected and propagated along grain boundaries to form characteristics of intergranular fracture and quasi-cleavage fracture. While under an alternating load, beta flecks acted as sites for low-cycle fatigue crack nucleation due to inhomogeneous alternating strains between soft GB alpha and aged beta matrix. The presence of beta flecks accelerates both the crack nucleation and early crack propagation. (C) 1999 Elsevier Science S.A. All rights reserved.
引用
收藏
页码:203 / 211
页数:9
相关论文
共 22 条
[1]  
*BOEING, 1982, BMS7260B
[2]   THE MELTING OF TITANIUM [J].
BOMBERGER, HB ;
FROES, FH .
JOURNAL OF METALS, 1984, 36 (12) :39-47
[3]   PRACTICAL CONSIDERATIONS FOR MANUFACTURING HIGH-STRENGTH TI-10V-2FE-3AL ALLOY FORGINGS [J].
CHEN, CC ;
BOYER, RR .
JOURNAL OF METALS, 1979, 31 (07) :33-39
[4]  
CHEN CC, 1980, TMS AIME, V1, P457
[5]  
DOU YQ, 1990, RARE METAL MAT ENG, V14, P59
[6]  
FELTNER CE, 1969, ASTM, P77
[7]   THE BETA-TITANIUM ALLOYS [J].
FROES, FH ;
BOMBERGER, HB .
JOURNAL OF METALS, 1985, 37 (07) :28-37
[8]  
FROES FH, 1977, FORGING PROPERTIES A, P143
[9]  
FROSYTH RJE, 1960, AIRCRAFT ENG, V32, P96
[10]   LOW-CYCLE FATIGUE CRACK NUCLEATION AND EARLY GROWTH IN TI-17 [J].
FUNKENBUSCH, AW ;
COFFIN, LF .
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1978, 9 (08) :1159-1167