Observation of short fatigue crack-growth process in SiC-fiber-reinforced Ti-15-3 alloy composite

Guo, Shuqi; Kagawa, Yutaka; Honda, Koichi

doi:10.1007/bf02652376

Cited by 17 publications

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Effect of interfacial debonding and sliding on matrix crack initiation during isothermal fatigue of SCS-6/Ti-15-3 composites

Liu

Tanaka

Masuda

2000

Metall Mater Trans A

View full text Add to dashboard Cite

Direct observation of initial damage-evolution processes occurring during cyclic testing of an unnotched SCS-6 fiber-reinforced Ti-15-3 composite has been carried out. The aligned fibers break at an early stage, followed by debonding and subsequent sliding along the interface between the reaction layer (RL) and Ti-15-3 alloy matrix. Matrix cracking initiation from the initial broken fiber and RL was avoided. This fracture behavior during cyclic loading is modeled and analyzed by the finiteelement method, with plastic deformation of the matrix being considered. The plastic strain in the matrix at the initial crack and at the deflected crack tips, when the interface crack is deflected into the RL after extensive interface debonding propagation, is characterized. The effects of interfacial debond lengths and test temperatures on the matrix cracking mechanism are discussed, based on a fatigue-damage summation rule under low-cycle fatigue conditions. The numerical results provide a rationale for experimental observations regarding the avoidance and occurrence of the matrix cracking found in fiber-reinforced titanium composites.

show abstract

Effect of interfacial debonding and sliding on matrix crack initiation during isothermal fatigue of SCS-6/Ti-15-3 composites

Liu

Tanaka

Masuda

2000

Metall Mater Trans A

View full text Add to dashboard Cite

show abstract

Interface characterization of duplex metal-coated SiC fiber-reinforced Ti-15-3 matrix composites

Guo

Kagawa

Fukushima

et al. 1999

Metall Mater Trans A

Self Cite

View full text Add to dashboard Cite

The interfacial reaction behavior of duplex metal (Cu/Mo and Cu/W)-coated SiC (SCS-6) fiberreinforced Ti-15-3 composites, before and after thermal exposure, has been studied. The effect of thermal exposure on the shear sliding resistance of these composites was also obtained using a thinspecimen push-out test. The results are compared to those of an original SiC (SCS-6) fiber-reinforced Ti-15-3 composite. The interfacial reaction behavior is strongly affected by the existence of a coating layer. Both the Cu/Mo and Cu/W coating layers prevent the growth of a reaction layer. However, the coatings could not effectively prevent diffusion of alloying elements; only the W layer exists after the thermal exposure. On the other hand, the interface shear sliding stress minimally depends on the duplex metal coating layers prior to the thermal exposure, and this sliding stress in both the SiC/Cu/Mo/Ti-15-3 and SiC/Cu/W/Ti-15-3 composites decreases slightly relative to that in the SiC/Ti-15-3 composite. After thermal exposure, the interface shear sliding stress increases for the SiC/Ti-15-3 composite. In distinction, the interface shear sliding stress significantly decreases after thermal exposure in both the SiC/Cu/Mo/Ti-15-3 and SiC/Cu/W/Ti-15-3 composites. Theses behaviors are attributed to the decrease of radial clamping stress, which originates from a volume expansion associated with the ␤ → ␣ phase transformation.

show abstract

Tensile properties of duplex metal-coated SiC fiber and titanium alloy matrix composites

Guo

Kagawa

Fukushima

et al. 1999

Metall Mater Trans A

Self Cite

View full text Add to dashboard Cite

Observation of short fatigue crack-growth process in SiC-fiber-reinforced Ti-15-3 alloy composite

Cited by 17 publications

References 21 publications

Effect of interfacial debonding and sliding on matrix crack initiation during isothermal fatigue of SCS-6/Ti-15-3 composites

Effect of interfacial debonding and sliding on matrix crack initiation during isothermal fatigue of SCS-6/Ti-15-3 composites

Interface characterization of duplex metal-coated SiC fiber-reinforced Ti-15-3 matrix composites

Tensile properties of duplex metal-coated SiC fiber and titanium alloy matrix composites

Contact Info

Product

Resources

About