晶粒尺寸对304L奥氏体不锈钢氢脆的影响

王艳飞, 李耀州, 黄玉婷, 谢宏琳, 吴炜杰

Effect of Grain Size on Hydrogen Embrittlement of 304L Austenitic Stainless Steel

WANG Yanfei, LI Yaozhou, HUANG Yuting, XIE Honglin, WU Weijie

表2 充氢试样的氢含量、脆性断裂区深度和有效氢扩散系数

Table 2 Hydrogen amount, brittle fracture region depth and effective hydrogen diffusivity of in-situ hydrogen-charged and hydrogen pre-charged specimens

Specimen	H pre-charged			In situ H-charged
Specimen	z_b / μm	m_H / μg	D_eff / m²·s^-1	z_b / μm	m_H / μg	D_eff / m²·s^-1
AT700-5	7.6±2.1	5.52	1.04×10^-17	/	0.98	/
AT800-20	9.6±2.6	6.25	1.67×10^-17	15.3±6.4	1.46	5.21×10^-15
AT900-20	20.0±4.3	6.89	6.87×10^-17	56.4±5.4	2.09	6.45×10^-14
AT1050-20	55.6±4.8	7.35	5.59×10^-16	178.0±4.2	5.98	6.37×10^-13