New generation ferritic and duplex stainless steels: Preliminary study on mechanical and in-service properties of welded joints

Research output: Contribution to conferenceOther conference contributionScientific

Abstract

This pre-screening study covers two novel ferritic and one duplex stainless steel: the 17% Cr - double Nb+Ti stabilised 1.4509 and 1.4521, the latter with additional 2% Mo alloying, and the so-called "lean duplex" grade 1.4162 with 21.5% Cr - 5% Mn - 1.5% Ni - N. The materials were used as 2 mm. Welded joints were fabricated using resistance spot (RSW), gas metal arc (GMAW) and laser welding (LBW). The joints were subjected to tensile and microhardness testing, as well as microstructural analysis. Critical pitting temperature (CPT) corrosion tests were performed on both the base materials and welded joints. The weld microhardness tests did not reveal any significant softening effect due to welding operations. Comprehensive CPT data were achieved for all the base materials and their welds. Microstructural cha-racterisation revealed that retaining the desired ferrite-austenite balance in duplex laser beam welds still remains a challenge
Original languageEnglish
Publication statusPublished - 2012
MoE publication typeNot Eligible
EventNordic Welding Conference 2012, NWC2012 - Oslo, Norway
Duration: 4 Oct 20125 Oct 2012

Conference

ConferenceNordic Welding Conference 2012, NWC2012
Abbreviated titleNWC2012
CountryNorway
CityOslo
Period4/10/125/10/12

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Welds
Stainless steel
Pitting
Microhardness
Gas metal arc welding
Laser beam welding
Alloying
Austenite
Laser beams
Ferrite
Screening
Welding
Corrosion
Temperature
Testing

Cite this

@conference{9289ba2b510f4297a28bfa44c54371bf,
title = "New generation ferritic and duplex stainless steels: Preliminary study on mechanical and in-service properties of welded joints",
abstract = "This pre-screening study covers two novel ferritic and one duplex stainless steel: the 17{\%} Cr - double Nb+Ti stabilised 1.4509 and 1.4521, the latter with additional 2{\%} Mo alloying, and the so-called {"}lean duplex{"} grade 1.4162 with 21.5{\%} Cr - 5{\%} Mn - 1.5{\%} Ni - N. The materials were used as 2 mm. Welded joints were fabricated using resistance spot (RSW), gas metal arc (GMAW) and laser welding (LBW). The joints were subjected to tensile and microhardness testing, as well as microstructural analysis. Critical pitting temperature (CPT) corrosion tests were performed on both the base materials and welded joints. The weld microhardness tests did not reveal any significant softening effect due to welding operations. Comprehensive CPT data were achieved for all the base materials and their welds. Microstructural cha-racterisation revealed that retaining the desired ferrite-austenite balance in duplex laser beam welds still remains a challenge",
author = "Mika Sir{\'e}n",
note = "Project code: X-WELD 79889_1.2.3.; Nordic Welding Conference 2012, NWC2012, NWC2012 ; Conference date: 04-10-2012 Through 05-10-2012",
year = "2012",
language = "English",

}

New generation ferritic and duplex stainless steels: Preliminary study on mechanical and in-service properties of welded joints. / Sirén, Mika.

2012. Nordic Welding Conference 2012, NWC2012, Oslo, Norway.

Research output: Contribution to conferenceOther conference contributionScientific

TY - CONF

T1 - New generation ferritic and duplex stainless steels: Preliminary study on mechanical and in-service properties of welded joints

AU - Sirén, Mika

N1 - Project code: X-WELD 79889_1.2.3.

PY - 2012

Y1 - 2012

N2 - This pre-screening study covers two novel ferritic and one duplex stainless steel: the 17% Cr - double Nb+Ti stabilised 1.4509 and 1.4521, the latter with additional 2% Mo alloying, and the so-called "lean duplex" grade 1.4162 with 21.5% Cr - 5% Mn - 1.5% Ni - N. The materials were used as 2 mm. Welded joints were fabricated using resistance spot (RSW), gas metal arc (GMAW) and laser welding (LBW). The joints were subjected to tensile and microhardness testing, as well as microstructural analysis. Critical pitting temperature (CPT) corrosion tests were performed on both the base materials and welded joints. The weld microhardness tests did not reveal any significant softening effect due to welding operations. Comprehensive CPT data were achieved for all the base materials and their welds. Microstructural cha-racterisation revealed that retaining the desired ferrite-austenite balance in duplex laser beam welds still remains a challenge

AB - This pre-screening study covers two novel ferritic and one duplex stainless steel: the 17% Cr - double Nb+Ti stabilised 1.4509 and 1.4521, the latter with additional 2% Mo alloying, and the so-called "lean duplex" grade 1.4162 with 21.5% Cr - 5% Mn - 1.5% Ni - N. The materials were used as 2 mm. Welded joints were fabricated using resistance spot (RSW), gas metal arc (GMAW) and laser welding (LBW). The joints were subjected to tensile and microhardness testing, as well as microstructural analysis. Critical pitting temperature (CPT) corrosion tests were performed on both the base materials and welded joints. The weld microhardness tests did not reveal any significant softening effect due to welding operations. Comprehensive CPT data were achieved for all the base materials and their welds. Microstructural cha-racterisation revealed that retaining the desired ferrite-austenite balance in duplex laser beam welds still remains a challenge

M3 - Other conference contribution

ER -