• Treffer 2 von 7
Zurück zur Trefferliste

The effects of weld filler material and cooling time t8/5 on the dynamic impact behaviour of high-strength laser-hybrid welds

  • The use of high-strength steels is wide spread in vehicle and crane manufacturing due to light weight reasons. These steels are used for impact of crash loaded components and therefore it is important to investigate high-strength welds at dynamic impact. Investigations of welds at high strain rates have been rarely conducted in the past. To determine the dynamic impact behaviour of hybrid laser-arc welds, the Split Hopkinson Pressure Bar (SHPB) technique was used. The base material was a quenched and tempered fine-grained structural steel with yield strength of 1100 MPa. The influence of two variables, cooling time t8/5 and strength of filler material, on the impact behaviour was studied. A matching and an under matching filler material were used. The cooling time t8/5 was varied to influence the microstructure in the heat affected zone (HAZ) and to analyse the effect on hardening and softening. Hardness measurements and optical microscopy was used to analyse the weld microstructureThe use of high-strength steels is wide spread in vehicle and crane manufacturing due to light weight reasons. These steels are used for impact of crash loaded components and therefore it is important to investigate high-strength welds at dynamic impact. Investigations of welds at high strain rates have been rarely conducted in the past. To determine the dynamic impact behaviour of hybrid laser-arc welds, the Split Hopkinson Pressure Bar (SHPB) technique was used. The base material was a quenched and tempered fine-grained structural steel with yield strength of 1100 MPa. The influence of two variables, cooling time t8/5 and strength of filler material, on the impact behaviour was studied. A matching and an under matching filler material were used. The cooling time t8/5 was varied to influence the microstructure in the heat affected zone (HAZ) and to analyse the effect on hardening and softening. Hardness measurements and optical microscopy was used to analyse the weld microstructure before and after the SHPB test. The investigations showed a correlation between the overall hardness of the weld, influenced by filler material and cooling time, on the maximum stress level during dynamic impact.zeige mehrzeige weniger

Volltext Dateien herunterladen

  • Paper Trends in Welding Research Format.pdf
    deu

Metadaten exportieren

Weitere Dienste

Teilen auf Twitter Suche bei Google Scholar Anzahl der Zugriffe auf dieses Dokument
Metadaten
Autor*innen:Thora Falkenreck
Koautor*innen:M. Klein, Marco Lammers, Thomas Böllinghaus
Dokumenttyp:Vortrag
Veröffentlichungsform:Präsentation
Sprache:Deutsch
Jahr der Erstveröffentlichung:2016
DDC-Klassifikation:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten
Freie Schlagwörter:High strength steel; Split Hopkinson pressure bar; Welding
Veranstaltung:Trends in Welding Research 2016
Veranstaltungsort:Tokyo, Japan
Beginndatum der Veranstaltung:11.10.2016
Enddatum der Veranstaltung:14.10.2016
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:09.11.2016
Referierte Publikation:Nein
Eingeladener Vortrag:Nein
Einverstanden
Diese Webseite verwendet technisch erforderliche Session-Cookies. Durch die weitere Nutzung der Webseite stimmen Sie diesem zu. Unsere Datenschutzerklärung finden Sie hier.