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. 2018 Nov 28;11(12):2403. doi: 10.3390/ma11122403

Figure 6.

Figure 6

Typical field-emission scanning electron microscope (FESEM) microstructure of the (a) quenching and tempering (QT) treated specimens, and the QT treated specimens after heating to 300 °C under tensile stress of (b) 0 MPa, (c) 20 MPa and (d) 40 MPa.