Fatigue crack growth under a constant amplitude loading of Al-6061-T6 welds obtained by modified indirect electric arc technique

R. R. Ambriz, G. Mesmacque, A. Ruiz, A. Amrouche, V. H. López, N. Benseddiq

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The characteristics of the fatigue crack growth in the base metal, weld metal and heat affected zone (HAZ) were quantified by testing compact type specimens of 6061-T6 welds obtained by the modified indirect electric arc technique. The fatigue crack growth depends on the microstructure imposed by the welding thermal cycle and it was observed that in the HAZ the crack growth rate is lower than that in the weld metal, but higher than that in the base metal. Microhardness maps revealed that this behaviour is due to the formation of a larger plastic zone around of the crack tip produced by loss of hardening. A comparison of fatigue crack growth of weld metal and HAZ for modified indirect electric arc and friction stir welding shows that the weld metal produced by friction stir welding exhibits better resistance to crack propagation, but both processes behaved similarly in the HAZ. © 2010 Maney Publishing.
Original languageAmerican English
Pages (from-to)514-521
Number of pages461
JournalScience and Technology of Welding and Joining
DOIs
StatePublished - 1 Aug 2010
Externally publishedYes

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electric arcs
Electric arcs
Fatigue crack propagation
Welds
heat affected zone
cracks
Metals
Heat affected zone
metals
friction stir welding
Friction stir welding
Crack propagation
crack tips
crack propagation
welding
Crack tips
hardening
Microhardness
microhardness
Hardening

Cite this

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abstract = "The characteristics of the fatigue crack growth in the base metal, weld metal and heat affected zone (HAZ) were quantified by testing compact type specimens of 6061-T6 welds obtained by the modified indirect electric arc technique. The fatigue crack growth depends on the microstructure imposed by the welding thermal cycle and it was observed that in the HAZ the crack growth rate is lower than that in the weld metal, but higher than that in the base metal. Microhardness maps revealed that this behaviour is due to the formation of a larger plastic zone around of the crack tip produced by loss of hardening. A comparison of fatigue crack growth of weld metal and HAZ for modified indirect electric arc and friction stir welding shows that the weld metal produced by friction stir welding exhibits better resistance to crack propagation, but both processes behaved similarly in the HAZ. {\circledC} 2010 Maney Publishing.",
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Fatigue crack growth under a constant amplitude loading of Al-6061-T6 welds obtained by modified indirect electric arc technique. / Ambriz, R. R.; Mesmacque, G.; Ruiz, A.; Amrouche, A.; López, V. H.; Benseddiq, N.

In: Science and Technology of Welding and Joining, 01.08.2010, p. 514-521.

Research output: Contribution to journalArticle

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AU - Ambriz, R. R.

AU - Mesmacque, G.

AU - Ruiz, A.

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AU - López, V. H.

AU - Benseddiq, N.

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