Single sided single pass submerged arc welding of austenitic stainless steel

K. Chi, M.S. McLean, N.A. McPherson, T.N. Baker

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The weld metal produced from a series of high productivity welds of 316LN austenitic stainless steel plate was examined to evaluate the effects of the use of a higher heat input process (> 2.5kJ/mm).This high heat input process was aimed at maximising single sided weld metal penetration in a single pass using simple square edge preparations and minimising time consuming handling operations. The evaluation was undertaken by correlating the local microstructure with the local toughness and microhardness of the cap, middle and root of the weld. It was established that the intermetallic phases / carbides present did not appear to have a significantly adverse effect on either corrosion or toughness. The phases observed and confirmed by the use of SAED were predominantly chi (χ) with some sigma( σ). No identifications were made of M23C6 which was observed in other studies of 316LN welds. A series of impact tests with variations in the notch positions showed that the thickness of the delta ferrite had an effect on the weld metal toughness. As a result of this work it was established that similar volume fractions of delta ferrite did not necessarily produce similar levels of weld metal toughness, but ferrite thickness did appear to have a contributory effect. Welding of 316LN stainless steel with a single sided single pass submerged arc welding process was satisfactorily undertaken up to 20mm plate thickness without preheat or post weld heat treatment. The ability to achieve this resulted in significant economic savings within the process for ship panel production combined with satisfactory weld metal properties.
LanguageEnglish
Pages1039-1048
Number of pages9
JournalMaterials Science and Technology
Volume23
Issue number9
DOIs
Publication statusPublished - Sep 2007

Fingerprint

Submerged arc welding
arc welding
austenitic stainless steels
Austenitic stainless steel
toughness
Welds
ferrites
metals
Metals
Toughness
Ferrite
heat
impact tests
notches
ships
productivity
welding
caps
carbides
microhardness

Keywords

  • austenitic stainless steel
  • metals
  • materials science
  • microstructures
  • microhardness

Cite this

Chi, K. ; McLean, M.S. ; McPherson, N.A. ; Baker, T.N. / Single sided single pass submerged arc welding of austenitic stainless steel. In: Materials Science and Technology. 2007 ; Vol. 23, No. 9. pp. 1039-1048.
@article{9cc5a0134e8b4288b91aa5bfbf913a75,
title = "Single sided single pass submerged arc welding of austenitic stainless steel",
abstract = "The weld metal produced from a series of high productivity welds of 316LN austenitic stainless steel plate was examined to evaluate the effects of the use of a higher heat input process (> 2.5kJ/mm).This high heat input process was aimed at maximising single sided weld metal penetration in a single pass using simple square edge preparations and minimising time consuming handling operations. The evaluation was undertaken by correlating the local microstructure with the local toughness and microhardness of the cap, middle and root of the weld. It was established that the intermetallic phases / carbides present did not appear to have a significantly adverse effect on either corrosion or toughness. The phases observed and confirmed by the use of SAED were predominantly chi (χ) with some sigma( σ). No identifications were made of M23C6 which was observed in other studies of 316LN welds. A series of impact tests with variations in the notch positions showed that the thickness of the delta ferrite had an effect on the weld metal toughness. As a result of this work it was established that similar volume fractions of delta ferrite did not necessarily produce similar levels of weld metal toughness, but ferrite thickness did appear to have a contributory effect. Welding of 316LN stainless steel with a single sided single pass submerged arc welding process was satisfactorily undertaken up to 20mm plate thickness without preheat or post weld heat treatment. The ability to achieve this resulted in significant economic savings within the process for ship panel production combined with satisfactory weld metal properties.",
keywords = "austenitic stainless steel, metals, materials science, microstructures, microhardness",
author = "K. Chi and M.S. McLean and N.A. McPherson and T.N. Baker",
year = "2007",
month = "9",
doi = "10.1179/174328407X161277",
language = "English",
volume = "23",
pages = "1039--1048",
journal = "Materials Science and Technology",
issn = "0267-0836",
number = "9",

}

Single sided single pass submerged arc welding of austenitic stainless steel. / Chi, K.; McLean, M.S.; McPherson, N.A.; Baker, T.N.

In: Materials Science and Technology, Vol. 23, No. 9, 09.2007, p. 1039-1048.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Single sided single pass submerged arc welding of austenitic stainless steel

AU - Chi, K.

AU - McLean, M.S.

AU - McPherson, N.A.

AU - Baker, T.N.

PY - 2007/9

Y1 - 2007/9

N2 - The weld metal produced from a series of high productivity welds of 316LN austenitic stainless steel plate was examined to evaluate the effects of the use of a higher heat input process (> 2.5kJ/mm).This high heat input process was aimed at maximising single sided weld metal penetration in a single pass using simple square edge preparations and minimising time consuming handling operations. The evaluation was undertaken by correlating the local microstructure with the local toughness and microhardness of the cap, middle and root of the weld. It was established that the intermetallic phases / carbides present did not appear to have a significantly adverse effect on either corrosion or toughness. The phases observed and confirmed by the use of SAED were predominantly chi (χ) with some sigma( σ). No identifications were made of M23C6 which was observed in other studies of 316LN welds. A series of impact tests with variations in the notch positions showed that the thickness of the delta ferrite had an effect on the weld metal toughness. As a result of this work it was established that similar volume fractions of delta ferrite did not necessarily produce similar levels of weld metal toughness, but ferrite thickness did appear to have a contributory effect. Welding of 316LN stainless steel with a single sided single pass submerged arc welding process was satisfactorily undertaken up to 20mm plate thickness without preheat or post weld heat treatment. The ability to achieve this resulted in significant economic savings within the process for ship panel production combined with satisfactory weld metal properties.

AB - The weld metal produced from a series of high productivity welds of 316LN austenitic stainless steel plate was examined to evaluate the effects of the use of a higher heat input process (> 2.5kJ/mm).This high heat input process was aimed at maximising single sided weld metal penetration in a single pass using simple square edge preparations and minimising time consuming handling operations. The evaluation was undertaken by correlating the local microstructure with the local toughness and microhardness of the cap, middle and root of the weld. It was established that the intermetallic phases / carbides present did not appear to have a significantly adverse effect on either corrosion or toughness. The phases observed and confirmed by the use of SAED were predominantly chi (χ) with some sigma( σ). No identifications were made of M23C6 which was observed in other studies of 316LN welds. A series of impact tests with variations in the notch positions showed that the thickness of the delta ferrite had an effect on the weld metal toughness. As a result of this work it was established that similar volume fractions of delta ferrite did not necessarily produce similar levels of weld metal toughness, but ferrite thickness did appear to have a contributory effect. Welding of 316LN stainless steel with a single sided single pass submerged arc welding process was satisfactorily undertaken up to 20mm plate thickness without preheat or post weld heat treatment. The ability to achieve this resulted in significant economic savings within the process for ship panel production combined with satisfactory weld metal properties.

KW - austenitic stainless steel

KW - metals

KW - materials science

KW - microstructures

KW - microhardness

U2 - 10.1179/174328407X161277

DO - 10.1179/174328407X161277

M3 - Article

VL - 23

SP - 1039

EP - 1048

JO - Materials Science and Technology

T2 - Materials Science and Technology

JF - Materials Science and Technology

SN - 0267-0836

IS - 9

ER -