Corrosion fatigue of spot-welded austenitic stainless steels in 3.5% NaCl solution

M.E. Somervuori, M.T. Alenius, H.E. Hänninen, Risto Karppi

Research output: Contribution to journalArticleScientificpeer-review

7 Citations (Scopus)

Abstract

Corrosion fatigue and fatigue properties of spot‐welded austenitic stainless steels EN 1.4301 and EN 1.4318 in 2B or 2F and 2H conditions were investigated in 3.5% sodium chloride (NaCl) solution and in air. The shear‐loaded specimens were single spot overlap joints.

The effect of steel grade, load, frequency, temperature and type of chloride on fatigue strength of the 1.0 mm thick steel specimens was evaluated by using the Taguchi Method®. Increase of the load, rise of temperature and lowering of the frequency accelerate corrosion fatigue of the spot‐welded steel samples. Type of chloride had only a minor effect on fatigue strength. The 2B grade spot‐welded steel samples exhibited better fatigue strength than the 2H grade samples of the same steels.

On the basis of the results obtained by the Taguchi Method® the S‐N curves were defined for the spot‐welded 1.9 mm thick steels in 3.5% sodium chloride solution at 50°C. For reference the fatigue experiments were performed in air at the ambient temperature. Comparison of the results shows that corrosive environment decreases remarkably the fatigue strength of the spot‐welded steels. The EN 1.4301 2H and EN 1.4318 2H steels have no distinctive difference in their corrosion fatigue strength even though they show a different fatigue behaviour in air.

The microscopic investigations indicate that the fatigue cracks in the spot welds initiate from either side of the recrystallised area in the HAZ outside the spot‐weld nugget both in air and in the corrosive environments. Pre‐exposure in the corrosive environment seems to have no major influence on the crack initiation, because the cracks do not initiate at the heat‐tinted area of the crevice where the crevice corrosion occurs.

Original languageEnglish
Pages (from-to)921 - 929
Number of pages9
JournalMaterials and Corrosion
Volume55
Issue number12
DOIs
Publication statusPublished - 2004
MoE publication typeA1 Journal article-refereed

Fingerprint

Corrosion fatigue
Steel
Austenitic stainless steel
fatigue
corrosion
steel
Caustics
Taguchi methods
Fatigue of materials
Sodium chloride
Air
Sodium Chloride
crack
Chlorides
air
sodium chloride
chloride
Crack initiation
Temperature
temperature

Keywords

  • corrosion fatigue
  • fatigue
  • spot weld
  • austenitic stainless steels
  • NaCl solution
  • Taguchi method
  • 1.4301
  • 1.4318

Cite this

Somervuori, M. E., Alenius, M. T., Hänninen, H. E., & Karppi, R. (2004). Corrosion fatigue of spot-welded austenitic stainless steels in 3.5% NaCl solution. Materials and Corrosion, 55(12), 921 - 929. https://doi.org/10.1002/maco.200403796
Somervuori, M.E. ; Alenius, M.T. ; Hänninen, H.E. ; Karppi, Risto. / Corrosion fatigue of spot-welded austenitic stainless steels in 3.5% NaCl solution. In: Materials and Corrosion. 2004 ; Vol. 55, No. 12. pp. 921 - 929.
@article{7d0dbf8aef734db1a626cce1ca9dc715,
title = "Corrosion fatigue of spot-welded austenitic stainless steels in 3.5{\%} NaCl solution",
abstract = "Corrosion fatigue and fatigue properties of spot‐welded austenitic stainless steels EN 1.4301 and EN 1.4318 in 2B or 2F and 2H conditions were investigated in 3.5{\%} sodium chloride (NaCl) solution and in air. The shear‐loaded specimens were single spot overlap joints. The effect of steel grade, load, frequency, temperature and type of chloride on fatigue strength of the 1.0 mm thick steel specimens was evaluated by using the Taguchi Method{\circledR}. Increase of the load, rise of temperature and lowering of the frequency accelerate corrosion fatigue of the spot‐welded steel samples. Type of chloride had only a minor effect on fatigue strength. The 2B grade spot‐welded steel samples exhibited better fatigue strength than the 2H grade samples of the same steels. On the basis of the results obtained by the Taguchi Method{\circledR} the S‐N curves were defined for the spot‐welded 1.9 mm thick steels in 3.5{\%} sodium chloride solution at 50°C. For reference the fatigue experiments were performed in air at the ambient temperature. Comparison of the results shows that corrosive environment decreases remarkably the fatigue strength of the spot‐welded steels. The EN 1.4301 2H and EN 1.4318 2H steels have no distinctive difference in their corrosion fatigue strength even though they show a different fatigue behaviour in air. The microscopic investigations indicate that the fatigue cracks in the spot welds initiate from either side of the recrystallised area in the HAZ outside the spot‐weld nugget both in air and in the corrosive environments. Pre‐exposure in the corrosive environment seems to have no major influence on the crack initiation, because the cracks do not initiate at the heat‐tinted area of the crevice where the crevice corrosion occurs.",
keywords = "corrosion fatigue, fatigue, spot weld, austenitic stainless steels, NaCl solution, Taguchi method, 1.4301, 1.4318",
author = "M.E. Somervuori and M.T. Alenius and H.E. H{\"a}nninen and Risto Karppi",
year = "2004",
doi = "10.1002/maco.200403796",
language = "English",
volume = "55",
pages = "921 -- 929",
journal = "Materials and Corrosion",
issn = "0947-5117",
publisher = "Wiley",
number = "12",

}

Somervuori, ME, Alenius, MT, Hänninen, HE & Karppi, R 2004, 'Corrosion fatigue of spot-welded austenitic stainless steels in 3.5% NaCl solution', Materials and Corrosion, vol. 55, no. 12, pp. 921 - 929. https://doi.org/10.1002/maco.200403796

Corrosion fatigue of spot-welded austenitic stainless steels in 3.5% NaCl solution. / Somervuori, M.E.; Alenius, M.T.; Hänninen, H.E.; Karppi, Risto.

In: Materials and Corrosion, Vol. 55, No. 12, 2004, p. 921 - 929.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Corrosion fatigue of spot-welded austenitic stainless steels in 3.5% NaCl solution

AU - Somervuori, M.E.

AU - Alenius, M.T.

AU - Hänninen, H.E.

AU - Karppi, Risto

PY - 2004

Y1 - 2004

N2 - Corrosion fatigue and fatigue properties of spot‐welded austenitic stainless steels EN 1.4301 and EN 1.4318 in 2B or 2F and 2H conditions were investigated in 3.5% sodium chloride (NaCl) solution and in air. The shear‐loaded specimens were single spot overlap joints. The effect of steel grade, load, frequency, temperature and type of chloride on fatigue strength of the 1.0 mm thick steel specimens was evaluated by using the Taguchi Method®. Increase of the load, rise of temperature and lowering of the frequency accelerate corrosion fatigue of the spot‐welded steel samples. Type of chloride had only a minor effect on fatigue strength. The 2B grade spot‐welded steel samples exhibited better fatigue strength than the 2H grade samples of the same steels. On the basis of the results obtained by the Taguchi Method® the S‐N curves were defined for the spot‐welded 1.9 mm thick steels in 3.5% sodium chloride solution at 50°C. For reference the fatigue experiments were performed in air at the ambient temperature. Comparison of the results shows that corrosive environment decreases remarkably the fatigue strength of the spot‐welded steels. The EN 1.4301 2H and EN 1.4318 2H steels have no distinctive difference in their corrosion fatigue strength even though they show a different fatigue behaviour in air. The microscopic investigations indicate that the fatigue cracks in the spot welds initiate from either side of the recrystallised area in the HAZ outside the spot‐weld nugget both in air and in the corrosive environments. Pre‐exposure in the corrosive environment seems to have no major influence on the crack initiation, because the cracks do not initiate at the heat‐tinted area of the crevice where the crevice corrosion occurs.

AB - Corrosion fatigue and fatigue properties of spot‐welded austenitic stainless steels EN 1.4301 and EN 1.4318 in 2B or 2F and 2H conditions were investigated in 3.5% sodium chloride (NaCl) solution and in air. The shear‐loaded specimens were single spot overlap joints. The effect of steel grade, load, frequency, temperature and type of chloride on fatigue strength of the 1.0 mm thick steel specimens was evaluated by using the Taguchi Method®. Increase of the load, rise of temperature and lowering of the frequency accelerate corrosion fatigue of the spot‐welded steel samples. Type of chloride had only a minor effect on fatigue strength. The 2B grade spot‐welded steel samples exhibited better fatigue strength than the 2H grade samples of the same steels. On the basis of the results obtained by the Taguchi Method® the S‐N curves were defined for the spot‐welded 1.9 mm thick steels in 3.5% sodium chloride solution at 50°C. For reference the fatigue experiments were performed in air at the ambient temperature. Comparison of the results shows that corrosive environment decreases remarkably the fatigue strength of the spot‐welded steels. The EN 1.4301 2H and EN 1.4318 2H steels have no distinctive difference in their corrosion fatigue strength even though they show a different fatigue behaviour in air. The microscopic investigations indicate that the fatigue cracks in the spot welds initiate from either side of the recrystallised area in the HAZ outside the spot‐weld nugget both in air and in the corrosive environments. Pre‐exposure in the corrosive environment seems to have no major influence on the crack initiation, because the cracks do not initiate at the heat‐tinted area of the crevice where the crevice corrosion occurs.

KW - corrosion fatigue

KW - fatigue

KW - spot weld

KW - austenitic stainless steels

KW - NaCl solution

KW - Taguchi method

KW - 1.4301

KW - 1.4318

U2 - 10.1002/maco.200403796

DO - 10.1002/maco.200403796

M3 - Article

VL - 55

SP - 921

EP - 929

JO - Materials and Corrosion

JF - Materials and Corrosion

SN - 0947-5117

IS - 12

ER -