Low temperature toughness of acicular ferrite pipeline steel and redefinition of “effective grain size”
Niu Yanlong, Liu Yansong, Liu Qingyou, Jia Shujun, Tong Shuai, Wang Bing
Heat Treatment of Metals . 2020, (7): 101 -110 .  DOI: 10.13251/j.issn.0254-6051.2020.07.022