Scanning Electron Microscopy versus Transmission Electron Microscopy for Material Characterization: A Comparative Study on High-Strength Steels

Table 2

Heat treatment history and subsequent Rockwell hardness for the four specimens M12, M16, M23, and M26.

	Rockwell hardness (HRC)	Heat treatment history
		Hardening	Temper 1	Temper 2	Rehardening	Temper 3	Temper 4
M12	52.8	843°C, 0.8 h	93°C, 2 h	468°C, 2 h	843°C, 0.9 h	163°C, 2 h	—
M16	34.8	843°C, 0.8 h	93°C, 2 h	496°C, 3 h	—	516°C, 3 h	538°C, 2 h
M23	36.6	857°C, 1 h	93°C, 2 h	482°C, 4 h	—	522°C, 2 h	546°C, 2 h
M26	51.5	857°C, 1 h	93°C, 2 h	—	—	—	—