奥氏体耐热钢<strong>Sanicro25</strong>蠕变行为和断裂特征

奥氏体耐热钢Sanicro25蠕变行为和断裂特征

吕德超, 曹铁山, 程从前, 周彤彤, 赵杰

Creep Behavior and Fracture Characteristic of Austenitic Heat-Resistant Steel Sanicro25

LV Dechao, CAO Tieshan, CHENG Congqian, ZHOU Tongtong, ZHAO Jie

表2 Sanicro25钢的蠕变门槛值应力分析

Table 2 Threshold stress analysis for creep of Sanicro25 steel

Assumed stress exponent, n	Temperature, T/K	Threshold stress, $σ_{t h}$ /MPa	Avg. correlation coeffcient R²/pct	Avg. Activation energy, Q/kJ·mol^-1
3	973	138.5±1.9	0.986	206.8±6.2
	998	122.4±1.3
	1023	99.8±3.0
5	973	82.9±3.9	0.995	286.5±8.5
	998	69.7±1.4
	1023	52.2±2.4