Reason for the ferrite grains surface graying in low carbon steel metallographic specimen
SHI Yangyu, ZHOU Manlin, XU Jiafa, ZENG Demeng, ZHOU Xin, LI Weijun
Physical Testing and Chemical Analysis Part A:Physical Testing . 2023, (11): 43 -47 .  DOI: 10. 11973/lhjy-wl202311012

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