Residual stresses in 18CrNiMo7-6 linear friction welded high strength steel chains

Dinis Garcia Nunes, Pedro Effertz, Luísa Quintino, Inês Pires, Franz Fuchs, N Enzinger

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Linear friction welding is a solid-state process that comprises rapid heating and cooling of the welded parts. Residual stresses (RS) as in every other welding process cannot be avoided. The presence of RS compromises the in-service performance and reliability. They influence stress corrosion cracking, fatigue strength, and the crack growth rate. Knowing the magnitude and nature of such stresses is critical for improving the quality of welded joints. Therefore, four different manufacturing stages of linear friction welded chain links were analyzed in the present study: “as forged” (F), “as welded” (A), “as welded” without flash (N), and post weld heat treated (P). The residual stress field was measured using the hole drilling (HD) method. The results of the hole drilling method showed to be independent of the measured position and symmetry with respect to the weld was observed in all evaluated regions. Close to the weld center line (WCL), the compressive stresses present in the “as forged” condition switched to tensile as a result of the welding process. However, in further regions, stresses remained almost unchanged for either A and N. The PWHT uniformizes the residual stress field along the whole weld region.
LanguageEnglish
Pages3703-3710
Number of pages7
JournalThe international journal of advanced manufacturing technology
Volume96
Issue number9-12
Early online date10 Mar 2018
DOIs
StatusPublished - Jun 2018

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High strength steel
Residual stresses
Welds
Friction
Drilling
Welding
Friction welding
Stress corrosion cracking
Compressive stress
Crack propagation
Cooling
Heating

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Residual stresses in 18CrNiMo7-6 linear friction welded high strength steel chains. / Garcia Nunes, Dinis ; Effertz, Pedro; Quintino, Luísa; Pires, Inês; Fuchs, Franz; Enzinger, N.

In: The international journal of advanced manufacturing technology, Vol. 96, No. 9-12, 06.2018, p. 3703-3710.

Research output: Contribution to journalArticleResearchpeer-review

Garcia Nunes, Dinis ; Effertz, Pedro ; Quintino, Luísa ; Pires, Inês ; Fuchs, Franz ; Enzinger, N. / Residual stresses in 18CrNiMo7-6 linear friction welded high strength steel chains. In: The international journal of advanced manufacturing technology. 2018 ; Vol. 96, No. 9-12. pp. 3703-3710.
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