Fusion welding of ultra-high strength structural steels-A review

TÜMER M., Schneider-Bröskamp C., Enzinger N.

JOURNAL OF MANUFACTURING PROCESSES, vol.82, pp.203-229, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Review
  • Volume: 82
  • Publication Date: 2022
  • Doi Number: 10.1016/j.jmapro.2022.07.049
  • Journal Name: JOURNAL OF MANUFACTURING PROCESSES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, ABI/INFORM, Compendex, INSPEC
  • Page Numbers: pp.203-229
  • Keywords: Ultra-high strength steel, Weld metal, Microstructure, Residual stress, Toughness, Hardness, Fatigue, Heat affected zone, HEAT-AFFECTED ZONE, MARTENSITE-AUSTENITE CONSTITUENT, MECHANICAL-PROPERTIES, IMPACT TOUGHNESS, ACICULAR FERRITE, WELDED-JOINTS, FATIGUE-STRENGTH, RESIDUAL-STRESSES, CRACK INITIATION, INCLUSION SIZE
  • Kocaeli University Affiliated: Yes

Abstract

Large-scale usage of high and ultra-high strength steels is strongly linked to the availability of suitable joining techniques ensuring consistent properties throughout the welded structure. For conventional structural steels, fusion welding techniques, such as gas metal- or submerged arc welding, are well established and widely used. In many cases these welding processes can also be utilized for high and ultra-high strength steels. Likewise, high energy density welding processes, e.g. laser beam or electron beam welding, can also be suitable choices for welding these materials. However, constraints such as missing filler metals, missing standardization, and small processing windows, especially in terms of allowed heat input, still limit their application. In this review scientific literature on fusion welding of various ultra-high strength structural steel grades, i.e. steels with a yield strength in the range of 690 to 1300 MPa, is reviewed and discussed. The main focus lies on experimental results regarding mechanical properties, such as tensile strength, hardness, impact toughness, fatigue, etc. as well as residual stresses and microstructural transformations.