大变形管线钢中F/B多相组织应变硬化行为和应力比研究*

汤忖江, 尚成嘉, 关海龙, 王学敏

Strain Hardening Behavior and Stress Ratio of High Deformability Pipeline Steel with Ferrite/Bainite Multi-phase Microstructure

TANG Cunjiang, SHANG Chengjia, GUAN Hailong, WANG Xuemin

表3 实验钢的修正C-J分析中各阶段应变硬化能力和转折应变(ε_t)

Table 3 The strain hardening capability of each stages and transition strain (ε_t) of experimental steel in modified C-J analysis

Experimental Steel	Stage I		Stage II		Stage III		Engineering strain/%
	1- $\begin{matrix} m \end{matrix}$	1/ $\begin{matrix} m \end{matrix}$	1- $\begin{matrix} m \end{matrix}$	1/ $\begin{matrix} m \end{matrix}$	1- $\begin{matrix} m \end{matrix}$	1/ $\begin{matrix} m \end{matrix}$	Transition strain		Elongation at maximum force (A_gt)
	1- $\begin{matrix} m \end{matrix}$	1/ $\begin{matrix} m \end{matrix}$	1- $\begin{matrix} m \end{matrix}$	1/ $\begin{matrix} m \end{matrix}$	1- $\begin{matrix} m \end{matrix}$	1/ $\begin{matrix} m \end{matrix}$	ε_t1 (stage I-II)		ε_t2 (stage II-III)
No.1	-14.8	0.06	-4.6	0.18	-13.4	0.07	0.6	3.3	12.2
No.2	-6.5	0.13	-6.9	0.13	-9.3	0.10	0.8	4.6	11.5
No.3	-4.9	0.17	-9.6	0.09	-11.3	0.08	0.8	3.1	9.6
No.4	-4.0	0.20	-12.5	0.07			0.7		6.7
No.5	-3.3	0.23	-24.3	0.04			0.4		1.6