EFFECTS OF CONTROL MODE AND R-RATIO ON THE FATIGUE BEHAVIOR OF A METAL-MATRIX COMPOSITE

被引：30

作者：

LERCH, B

HALFORD, G

机构：

[1] NASA Lewis Research Center, Cleveland, OH 44135

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1995年 / 200卷 / 1-2期

关键词：

CONTROL MODE; R-RATIO; FATIGUE; METAL MATRIX COMPOSITE;

D O I：

10.1016/0921-5093(95)07005-2

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Thick specimens of [0](32) SiC/Ti-15-3 were cycled under a variety of loading conditions. Specimens were fatigued in strain- and load-controlled modes at both R = 0 (zero-tension) and R = -1 (fully reversed) loading ratios. In addition, a hybrid strain-controlled mode at R = 0 was used to simulate the true strain-controlled behaviour. The strain-controlled specimens had longer lives compared with the load-controlled specimens when cycled al an R-ratio of zero. Under fully reversed loading, there was no difference between the strain- and load-controlled modes. The hybrid strain-controlled data were found to approximate the load-controlled data better, rather than the true strain-controlled situation. Damage occurred through transverse fibre cracks for R = 0 loading for both the load- and strain-controlled modes. However, fully reversed loading caused matrix cracking to be the operative damage mechanism.

引用

页码：47 / 54

页数：8

共 9 条

[1]

[Anonymous], 1987, FATIGUE COMPOSITE MA

[2]

BARTOLOTTA PA, 1993, AM SOC TEST MATER, V1206, P190

[3]

BARTOLOTTA PA, 1991, ASME AD, V22, P45

[4]

CASTELLI MG, 1993, ASME DE, V55, P213

[5]

GAYDA J, 1990, FUNDAMENTAL RELATIONSHIPS BETWEEN MICROSTRUCTURES AND MECHANICAL PROPERTIES OF METAL MATRIX COMPOSITES, P497

[6]

MAJUMDAR BS, 1993, NASA CR191181

[7] ISOTHERMAL FATIGUE BEHAVIOR OF A TITANIUM MATRIX COMPOSITE UNDER A HYBRID STRAIN-CONTROLLED LOADING CONDITION [J].

SANDERS, B ;

MALL, S .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1995, 200 (1-2) :130-139

[8]

1994, ANN BOOK ASTM STANDA, P465

[9]

1994, ANN BOOK ASTM STANDA, P101

← 1 →