Fig. 1 BSE image of Z3CN20 09M DSS

Fig. 2 Fracture morphologies of specimens aged at 400 °C for a, b 0 h, c, d 10,000 h

Fig. 3 Longitudinal section morphologies near the fracture of specimens aged at 400 °C for a0 h, b 10,000 h

Fig. 4 EBSD orientation maps in three different deformation regions: a unaged at IR; b unaged at IIR; c unaged at IIIR; d aged for 10,000 h at IR; e aged for 10,000 h at IIR; f aged for 10,000 h at IIIR (red: < 001 >; blue: < 111 >; green: < 101 >; IPF: inverse pole figure)

Fig. 5 Phase and grain boundary maps in three regions deformed differently: a unaged at IR; bunaged at IIR; c unaged at IIIR; d aged for 10,000 h at IR; e aged for 10,000 h at IIR; faged for 10,000 h at IIIR (red areas: ferrite phase; fine black lines: 5°-15° small misorientation; thick black lines: 15°-45° intermediate misorientation; green lines: > 45° large misorientation)

Fig. 6 Distribution of misorientation angle in three regions deformed differently: a ferrite phase in unaged samples; b ferrite phase in aged samples; c austenite phase in unaged samples; d austenite phase in aged samples

Fig. 7 Strain contouring mappings in three regions: a unaged at IR; b unaged at IIR; c unaged at IIIR; d aged for 10,000 h at IR; e aged for 10,000 h at IIR; f aged for 10,000 h at IIIR (red lines: phase boundaries; yellow region: high value of micro-strain)

Fig. 8 Distribution of strain values in three regions: a ferrite phase in unaged and aged samples; b austenite phase in unaged and aged samples

Fig. 9 TEM images in ferrite and austenite phases of specimens: a ferrite phase in unaged samples; b ferrite phase in aged samples; c deformation areas in unaged samples; ddeformation regions in samples aged at 400 °C for 10,000 h