Nitride layer growth in iron and titanium alloys: Studies by electron probe microanalysis

Conference · Fri Jan 01 00:00:00 EST 1988

OSTI ID:7173145

Semarge, R E; Metin, E; Inal, O T

The present study addresses the surface hardening of Fe and Ti by plasma nitriding. The work describes quantitative electron probe microanalysis of the nitride layers and composition gradients which form during the nitriding process in iron (600/degree/C) and titanium (800-1080/degree/C). Such measurements are the key to developing quantitative diffusion models for the nitriding reaction which are necessary to optimize the nitriding process (e.g., prediction of microstructural evolution as a function of time and temperature). It is the objective of the present work to develop the quantitative electron probe microanalysis (EPMA) techniques to determine the compositions of Fe and Ti nitrides and to measure concentration gradients of N in metallic phases of Fe and Ti. 17 refs., 8 figs.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 7173145
• Report Number(s): SAND-88-0662C; CONF-880841-4; ON: DE88007207
• Resource Relation: Conference: MAS/EMSA microbeam analysis conference, Milwaukee, WI, USA, 7 Aug 1988; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
IRON ALLOYS
SURFACE HARDENING
TITANIUM ALLOYS
ARRHENIUS EQUATION
DIFFUSION
EQUATIONS
LAYERS
MICROSTRUCTURE
NITRIDES
PHASE DIAGRAMS
SURFACE PROPERTIES
ALLOYS
CRYSTAL STRUCTURE
DIAGRAMS
HARDENING
NITROGEN COMPOUNDS
PNICTIDES
SURFACE TREATMENTS
360103* - Metals & Alloys- Mechanical Properties
360101 - Metals & Alloys- Preparation & Fabrication