激光拉曼测量SiC(f)/Ti-22Al-26Nb复合材料界面残余应力

Determination of Interfacial Residual Stresses in SiC(f)/Ti-22Al/26Nb Composites Using Raman Spectroscopy

摘要:

利用激光拉曼方法直接测量SiC(f)/Ti-22Al-26Nb复合材料中SiC纤维表面C涂层的拉曼吸收光谱，由此计算出复合材料的残余应力，并对复合材料的残余应力进行有限元模拟计算分析。结果表明：复合材料界面反应层起到降低残余应力的作用，反应层越厚残余应力降低值越大，试验结果与模拟计算结果基本一致

Abstract:

Raman spectroscopy was used to measure residual stress of carbon layer on SiC fibre embedded longitudinally in SiC(f)/Ti-22Al-26Nb composites with different reaction layers. By measuring the band shifts of carbon layer, the residual stress arising from thermal expansion mismatch was also determined from the SiC fibre. Results show that as the thickness of reaction layer increases the interfacial residual stress dramatically decreases. Finite element analyses have similar results with the test