Determination of Susceptibility to Intergranular Corrosion of UNS 31803 Type Duplex Stainless Steel by Electrochemical Reactivation Method: A Comparative Study

Table 4

EDS analysis of phases present in solution annealed and aged condition of DSS.

Heat treatment	Phase	Cr; (wt.%)	Ni; (wt.%)	Mo; (wt.%)	Mn; (wt.%)	Si; (wt.%)	S; (wt%)	Fe; (wt%)
Solution annealed	General composition	22.04	4.45	2.69	1.49	0.45	0.003	68.29
Solution annealed at 1050°C/1 hr	𝛼	26.32	4.87	4.15	1.59	0.74	—	62.32
	𝛾	23.55	7.08	—	1.85	—	1.19	66.33
Aged at 800°C/31622 min	𝛾2	22.03	6.10	2.27	2.05	0.56	—	66.98
	𝛾2	19.97	7.20	—	2.22	0.72	—	69.90
	𝛾2	20.23	6.29	—	2.41	—	—	71.08
	𝜎	32.15	2.26	6.66	1.80	0.71	—	56.41
	𝛾2	21.92	6.16	—	1.95	—	0.80	69.17
Aged at 800°C/316 min	𝛼	27.71	3.47	—	—	0.55	0.98	67.28
	𝛾2	26.97	2.77	—	—	—	0.91	69.36
	𝛾2	20.26	4.76	—	2.10	0.61	—	72.28
	𝜎	30.76	3.36	7.88	1.80	0.71	—	55.50