Fracture properties of zinc coating layers in a galvannealed steel and an electrolytically galvanized steel

Research output: Contribution to journalArticleScientificpeer-review

Researchers

  • Jinshan He
  • Junhe Lian
  • Anke Aretz
  • Napat Vajragupta
  • Ude Hangen
  • Frank Goodwin
  • Sebastian Münstermann

Research units

  • RWTH Aachen University
  • Massachusetts Institute of Technology
  • Ruhr University Bochum
  • Bruker Nano GmbH
  • International Zinc Association

Abstract

The zinc coating layer fracture properties of a galvannealed steel and an electrolytically galvanized steel are analyzed by conducting the in-situ bending test with newly designed samples. It is found that the fracture develops much earlier in the coating layers of the galvannealed steel than that of the electrolytically galvanized steel. Using transmission electron microscope and energy dispersive X-ray spectroscopy, the intermetallic phases of the coating layers are characterized and it is found that the early crack initiation in a galvannealed steel is mainly triggered in the gamma phase. Combining with nanoindentation tests and corresponding simulation, the deformability of intermetallic phases are analyzed to explain the failure behavior of coating layers in the two steels.

Details

Original languageEnglish
Pages (from-to)320-325
Number of pages6
JournalMATERIALS SCIENCE AND ENGINEERING A: STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume732
Publication statusPublished - 8 Aug 2018
MoE publication typeA1 Journal article-refereed

    Research areas

  • Electrolytically galvanized steel, Fracture properties, Galvannealed steel, Zinc coating layer

ID: 27285182