An Investigation of the Effects of Layer Architecture on Tensile Damage Mechanisms in a Silicon Carbide (SiC) Fiber-Reinforced Titanium Matrix Composite
An Investigation of the Effects of Layer Architecture on Tensile Damage Mechanisms in a Silicon Carbide (SiC) Fiber-Reinforced Titanium Matrix Composite
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层结构对碳化硅 (SiC) 纤维增强钛基复合材料拉伸损伤机制影响的研究
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
W. Soboyejo
中科院分区：
文献类型：
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作者：
O. Jin;Y. Li;W. Soboyejo
本文介绍了Ti-15-3/SCS-6（SiC）复合材料层结构（±45°和0/±45°）对变形和开裂现象影响的最新研究结果。变形和开裂现象阐明了增量加载过程中的微观观察失败。初始损伤发生早期通过纤维和主要TiC反应层之间的脱粘。随后是一系列复杂的损伤，包括：基体开裂、亚晶粒形成、应力诱导α相沉淀、微孔成核和聚结、纤维断裂和灾难性失效。[±45°]2s复合材料中的断裂通过剪切机制发生。然而，在[0±45°2s]复合材料中观察到轴向失效模式。复合强度进行了比较，从蔡-希尔准则获得的经验估计。
This paper presents the results of recent studies of the effects of layer architecture (±45° and 0/±45°) on deformation and cracking phenomena in Ti-15-3/SCS-6 (SiC) composites. Deformation and cracking phenomena were elucidated by microscopic observations during incremental loading to failure. The initial damage occurred early via debonding between the fibers and the predominantly TiC reaction layer. This was followed by a complex sequence of damage that included: matrix cracking, sub-grain formation, stress-induced alpha phase precipitation, microvoid nucleation and coalescence, fiber fracture and catastrophic failure. Fracture in the [±45°]2s composite occurred by shear mechanisms. However, an axial failure mode was observed in the [0±45°2s composite. The composite strengths are compared with empirical estimates obtained from the Tsai–Hill criterion.