Nanoscale phase separations in as-fabricated thick super duplex stainless steels

Hosseini, Vahid,1987-Högskolan Väst,Avdelningen för svetsteknologi (SV),PTW,University West (author)

Nanoscale phase separations, and effects of these, were studied for thick super duplex stainless steel products by atom probe tomography and mechanical testing. Although nanoscale phase separations typically occur during long-time service at intermediate temperatures (300-500 degrees C, our results show that slowly cooled products start to develop Fe and Cr separation and/or precipitation of Cu-rich particles already during fabrication. Copper significantly slowed down the kinetics at the expense of Cu-rich particle precipitation, where the high-copper material subjected to hot isostatic pressing (HIP), with Delta t(500-400) of 160 s and the low-copper hot-rolled plate with Delta t(500-400) of 2 s had the same level of Fe and Cr separation. The phase separations resulted in lower toughness and higher hardness of the HIP material than for hot-rolled plate. Therefore, both local cooling rate dependent and alloy composition governed variations of phase separations can be expected in as-fabricated condition.

Lindgren, Kristina,1989Department of Physics, Chalmers University of Technology, 412 96, Gothenburg (SWE),Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)krilind (author)
Thuvander, Mattias,1968Department of Physics, Chalmers University of Technology, 412 96, Gothenburg, (SWE),Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)matthu (author)
Gonzalez, DanielBodycote, 735 23, Surahammar (SWE) (author)
Oliver, JamesOutokumpu Stainless AB, 774 41, Avesta (SWE),Outokumpu Stainless Steel AB (author)
Karlsson, Leif,1956-Högskolan Väst,Avdelningen för svetsteknologi (SV),PTW,University West(Swepub:hv)leikar (author)
Högskolan VästAvdelningen för svetsteknologi (SV) (creator_code:org_t)

In:Journal of Materials Science: SPRINGER56:21, s. 12475-124850022-24611573-4803

By the author/editor: Hosseini, Vahid, ...; Lindgren, Kristi ...; Thuvander, Matti ...; Gonzalez, Daniel; Oliver, James; Karlsson, Leif, ...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...; and Manufacturing Su ...

NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...; and Other Chemistry ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...; and Metallurgy and M ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Chemical Enginee ...; and Corrosion Engine ...

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