High Temperature Creep Behavior of Cr3C2 Composites

,; ,; ,; ,; ,; ,

J. Korean Ceram. Soc. > Volume 32(11); 1995 > Article

Journal of the Korean Ceramic Society 1995;32(11): 1219.

크롬-카바이드 복합체의 고온 크리프 거동

김지환, 한동빈¹, 김기태

포항공과대학교 기계공학과
¹산업과학기술연구소

High Temperature Creep Behavior of Cr3C2 Composites

ABSTRACT

Creep behaviors of Cr3C2 composites containing 90 wt% Cr3C2 and 10 wt% Ni were studied at high temperature. Compression tests at 100$0^{circ}C$ and bending tests at 100$0^{circ}C$ and 105$0^{circ}C$ were done in argon environment. In all test conditions primary and steady-state creep behaviors were observed. Stress exponent and activatiion energy were determined from the experimental data. By microstructural analysis of Cr3C2 composites after creep test, the separate agglomerations of Ni phase were observed. Numerical analysis was also studied to analyze bending creep behaviors of Cr3C2 by assumming different tensile and compressive creep behavior in a bending sample. From the analysis, it was found that the stress state at the compressive region as applied stress increased. The observed creep rates were compared with the predicted creep rates by estimating power-law creep parameters from bending test data.

Key words: Creep behaviors, Bend test, Compression test, Composites, Stress distribution, Creep strain rate