J
John G. Speer
Researcher at Colorado School of Mines
Publications - 213
Citations - 10380
John G. Speer is an academic researcher from Colorado School of Mines. The author has contributed to research in topics: Austenite & Martensite. The author has an hindex of 44, co-authored 205 publications receiving 8521 citations. Previous affiliations of John G. Speer include Bethlehem Steel.
Papers
More filters
Journal Article
Color tint-etching for multiphase steels
Journal ArticleDOI
Austenite recrystallization and carbonitride precipitation in niobium microalloyed steels
John G. Speer,Steven S. Hansen +1 more
TL;DR: In this paper, the response of austenite to thermomechanical treatment is investigated in two series of niobium microalloyed steels, and it was found that a lower carbon concentration results in faster austenites recrystallization, due to a smaller carbonitride supersaturation, which leads to a reduced precipitate nucleation rate.
Journal ArticleDOI
Titanium nitride precipitation behavior in thin-slab cast high-strength low-alloy steels
TL;DR: In this article, the potential for obtaining and utilizing titanium nitride refinement via the increased postsolidification cooling rates associated with thin-slab casting was assessed by transmission electron microscope (TEM) examination of carbon extraction replicas.
Journal ArticleDOI
On measurement of retained austenite in multiphase TRIP steels - results of blind round robin test involving six different techniques
Pascal Jacques,Sébastien Allain,Olivier Bouaziz,A. De,Anne-Françoise Gourgues,B.M. Hance,Yvan Houbaert,J. Huang,A. Iza-Mendia,Silvio E. Kruger,Mihai Radu,Ludovic Samek,John G. Speer,Lie Zhao,S. van der Zwaag +14 more
TL;DR: In this article, the authors report the results of a blind round robin test dedicated to the measurement of the retained austenite content of different TRIP assisted multiphase steels.
Journal ArticleDOI
Comments on “On the definitions of paraequilibrium and orthoequilibrium” by M. Hillert and J. Ågren, Scripta Materialia, 50, 697–9 (2004)
TL;DR: Hillert and Agren as discussed by the authors suggested that the term constrained paraequilibrium (CPE) is useful and shares a common ancestry with paraquilibrium, and that CPE is unlikely to apply under conditions where there is appreciable mobility of substitutional alloying elements.