CREEP BEHAVIOR OF AN EASY ORIENTED Ti-48Al PST CRYSTAL
来源期刊：中国有色金属学报(英文版)1996年第4期
论文作者：Lin Jianguo Zhou Yajian Zhang Yonggang Chen Changqi
文章页码：82 - 86
Key words：TiAl alloy; PST crystal ;creep behavior
Abstract: The creep deformation behavior of an easy oriented PST crystal was investigated at 800℃ in compression creep. The stress range was 120MPa to 200MPa. The creep curves showed a steady state stage. The application of a power-law equation led to a stress exponent n=6.6 and the creep activation energy Qc=282 kJ/mol, which indicated that dislocation climb controlls creep mechanism. TEM observation of the crept samples at steady state regime showed the formation of substructures in some γ plates.
