Eddy Current Transducer Dedicated for Sigma Phase Evaluation in Duplex Stainless Steel

Table 1

List of samples.

Sample	Heat treatment	Temperature [°C]	Time of treatment [h]	Percentage of austenite [%]	Percentage of ferrite [%]	Percentage of sigma phase [%]
01—ref. sample	Sol.	1200	1	44.56	55.44	0
07	Sol. + aging	1200 + 800	1 + 1/2	43.38	55.92	0.7
19	Sol. + aging	1200 + 800	1 + 3/4	44.8	52.1	3.05
18	Sol. + aging	1200 + 800	1 + 3/4	44.9	51.6	3.2
02	Sol. + aging	1200 + 800	1 + 1	45.76	45.88	8.3
10	Sol. + aging	1200 + 750	1 + 2	47.28	37.64	15