Duplex uamea uamea(DSS) e faasino i se vaega o u'amea u'amea ma metallographic microstructure o ferrite ma austenite taʻitasi faʻamaumauga mo le tusa ma le 50%. E masani lava, o mea o loʻo i lalo ole vaega e manaʻomia e le itiiti ifo i le 30%. I le tulaga o le maualalo o le carbon content, o le Cr content o le 18% i le 28%, ma le Ni content e 3% i le 10%. O nisi u'amea u'amea duplex o lo'o i ai fo'i elemene fa'afefiloi e pei o Mo, Cu, Nb, Ti, ma N. O le DSS o lo'o iai uiga o austenitic ma ferritic stainless steel. Pe a faatusatusa i le ferrite, e maualuga atu le palasitisi ma le ductility, e leai se potu vevela brittleness, ma matua faaleleia intergranular corrosion tetee ma le uelo faatinoga, ae tumau pea brittleness, conductivity vevela maualuga, ma superplasticity pei ferrite uamea stainless. Pe a faatusatusa iaustenitic uamea uamea, DSS o loʻo i ai le malosi maualuga ma faʻaleleia atili le teteʻe atu i le intergranular corrosion ma le chloride stress corrosion. Duplex u'amea u'amea e sili ona lelei tete'e pitting corrosion ma o se nickel-sefe u'amea uamea. Avanoa togi o le u'amea u'amea lua lafo lafo e alu leiloa tupe teu faafaigaluega: 1.4460, 1.4462, 1.4468, 1.4469, 1.4517, 1.4770, A 890 1C, A 890 1A, A 890 3A, A 890 3A, A 908 A 1B, A 995 4A, A 995 5A, 2205, 2507, 022Cr22Ni5Mo3N, 022Cr25Ni6Mo2N
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