Recent advances in high-strength, low-carbon, precipitation-strengthened ferritic steels

S. Vaynman*, Dieter Isheim, M. E. Fine, David N Seidman, S. P. Bhat

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

4 Scopus citations

Abstract

Low-carbon, ferritic, precipitation-strengthened steels are being investigated seeking ever-increasing yield strengths with high impact fracture toughness properties at room temperature and -40°C. Low carbon steels containing Cu, Ni, and Al, as well as NbC for grain refinement, achieve yield strengths near 1000 MPa when solution treated and aged to obtain precipitation hardening. When quenched from 900°C, the matrix is ferritic with no evidence for martensite. The composition distributions within nanometer diameter precipitates formed on aging at 500°C are measured employing three-dimensional atom-probe (3DAP) microscopy. At an aging time of 3 hrs (underaged condition) the Cu-rich precipitates are less than 2 nm in diameter and contain significant amounts of Ni, Al and Fe. Spatially isolated Ni, Al precipitates have not been detected.

Original languageEnglish (US)
Pages (from-to)525-530
Number of pages6
JournalMaterials Science and Technology
Volume1
StatePublished - Dec 1 2004
EventMaterials Science and Technology, MS and T 2004; Volume 1: AIST Process Metallurgy, Product Quality and Applications Proceedings - New Orleans, LA, United States
Duration: Sep 26 2004Sep 29 2004

Keywords

  • 3-dimensional atom-probe (3DAP) microscopy
  • Fracture toughness
  • High-strength steel
  • Nano-precipitates

ASJC Scopus subject areas

  • Engineering(all)

Fingerprint Dive into the research topics of 'Recent advances in high-strength, low-carbon, precipitation-strengthened ferritic steels'. Together they form a unique fingerprint.

Cite this