Catalogue Of Pictures

Catalogue of Pictures

Setup of etching circuit and electrolysis

P.2

X-Ray Diffractograms

P.3

A.C. Susceptibility – Temperature Curves

P.4 – P.5

Phase Fraction – Temperature Graph

P.6

Optical Micrographs

P.7 –

P.8 SEM Micrographs

P.9

EDS Result

P.10

1

Setup of etching circuit and electrolysis

Fig 3.1 The setup of etching circuit

2

Fig 3.2 The setup of electrolysis

X-Ray Diffractograms

3

Fig 4.1 X-ray diffractograms for 750°C aged sample with precipitate and treated sample

solution-

A.C. Susceptibility – Temperature Curves

Fig 4.2 χ-T curve for the 1 hour, 1050°C solution treated sample

4

Fig4.3 χ-T curve for the 750 oC aged sample (Aged for 6 hours)

Fig 4.4 χ-T curve for the 850 oC aged sample (Aged for 6 hours)

5

Fig 4.6 χ-T curve for the precipitate extracted from 750 oC sample

Phase Fraction – Temperature Graph

Fig4.5 Thermodynamic calculations of equilibrium phase fractions in 2205 duplex stainless steel as a function of temperature

6

Optical Micrographs

Fig 4.7a Optical micrograph of 1 hour, 1050 oC solution treated sample, etched by 10% (200X)

Fig 4.7b Optical micrograph of 1 hour, 1050 oC solution treated sample, etched by 10% (500X)

7

Fig 4.8 Optical micrograph of 6 hours, 750 oC aged sample, etched by 10% KOH (200X)

8

Fig 4.9 Optical micrograph of 6 hours, 750 oC aged sample, etched by 10% KOH (500X)

SEM Micrographs

Fig 4.10 SEM micrograph of 1 hour, 1050 oC solution treated sample, etched by 10% KOH (4000X)

9

Fig 4.11 SEM micrograph of 6 hour, 750 oC aged sample, etched by 10% KOH (4000X)

EDS Result

Spectrum Spectrum 1 Spectrum 2 Spectrum 3 Spectrum 4 Spectrum 5

Si

Cr

Mn

Fe

Co

Ni

34.72 1.66 57.98 1.11 4.53 0.42 29.42 2.11 63.27 1.04 3.74 21.91 1.96 66.63 1.22 8.28 0.42 29.63 1.51 63.91 0.88 3.65 0.39 30.29 1.49 63.41 1.11 3.31

10

Table 4 EDS result of the compositions in different positions (weight %)

11