Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Relative phase stability of L12 and DO22/DO23 structures in Al3Nb, Al3Zr and Al3V compounds

Journal Article · · Intermetallics
 [1];  [1];  [1];  [1];  [2];  [2];  [3];  [4];  [2];  [1]
  1. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
  2. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
  3. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
  4. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Chemical Sciences Division
The relative stability of the different tri-aluminide (Al3M) phases in three binary systems (M = Zr, Nb and V) was assessed for their potential to form fine cubic L12 precipitates in additively manufactured alloys. Supersaturated thin films of Al-(8–30) at% M were sputtered and heat treated during in-situ x-ray diffraction (XRD) measurements to observe the temperature ranges of stability for each phase. As-sputtered films were then processed with laser tracks simulating additive manufacturing solidification conditions, and the formation of phases in the laser tracks was correlated with density functional theory (DFT) and nucleation rate calculations. We found that the metastable L12 structure is highly competitive with the stable DO23 structure in the Al-Zr system, but much less stable than the DO22 structure in the Al-Nb system, and both the DO22 and Al8V5 structure in the Al-V system. Furthermore, these experimental results were found to be in good agreement with the DFT and kinetic calculations, as we determined that the metastable L12 in Al-Zr only requires a small amount of undercooling to favor its nucleation over the stable DO23, suggesting additive manufacturing can be a viable pathway to develop Al-Zr alloys strengthened by a high volume fraction of L12 Al3Zr phase.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Materials & Manufacturing Technologies Office (AMMTO); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
3002919
Journal Information:
Intermetallics, Journal Name: Intermetallics Vol. 182; ISSN 0966-9795
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (36)

The Al-Zr (aluminum-zirconium) system journal June 1992
The Al−Nb system (Aluminum-Niobium) journal June 1981
Al-V (aluminum-vanadium) journal August 1989
Theory for the trapping of disorder and solute in intermetallic phases by rapid solidification journal December 1989
High temperature phase equilibria of the Ll2 composition in the AlTiNi, AlTiFe, and AlTiCu systems journal March 1989
Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set journal July 1996
Formation of ternary L12 compounds in Al3Ti-base alloys journal January 1993
Crystallographic structure of Al3Nb in laser-processed Al–Nb alloys journal November 1999
First-principles calculation of structural energetics of Al–TM (TM=Ti, Zr, Hf) intermetallics journal June 2005
Microstructure and mechanical properties of Al-Mg-Zr alloys processed by selective laser melting journal July 2018
Grain refinement mechanisms in additively manufactured nano-functionalized aluminum journal November 2020
Diffusion, atomic transport, and ordering in Al-Zr alloys: FCC and liquid phases journal November 2023
First-principles calculations of binary Al compounds: Enthalpies of formation and elastic properties journal December 2011
Thermodynamic description of the binary Al–V and ternary Al–Cr–V systems journal September 2023
The Al–B–Nb–Ti system journal March 2009
Recent developments and outstanding challenges in theory and modeling of liquid metals journal October 2007
First-principles study of stability, electronic properties and anisotropic elasticity of Al3M (M=Ti, Ta, V, Nb, Hf) intermetallic compounds journal October 2020
First principle calculations of structural, electronic and thermodynamic properties of Al3(TixV1−x) alloy in D022 and L12 structures journal February 2013
The generalized Lindemann melting coefficient journal September 2020
On the Lindemann Criterion for Quantum Clusters at Very Low Temperature journal February 2011
Fabrication of high-quality single-crystal Cu thin films using radio-frequency sputtering journal August 2014
Correlation of Liquid‐Solid Interfacial Energies Calculated from Supercooling of Small Droplets journal May 1950
First-principles investigation of thermodynamic, elastic and electronic properties of Al3V and Al3Nb intermetallics under pressures journal February 2015
Physics of the Lindemann melting rule journal August 2009
Self-Consistent Equations Including Exchange and Correlation Effects journal November 1965
Ab initiomolecular dynamics for liquid metals journal January 1993
Projector augmented-wave method journal December 1994
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
Generalized Gradient Approximation Made Simple journal October 1996
Physical and mechanical metallurgy of Ni3Al and its alloys journal January 1989
Thermodynamic Assessment of the Al-Zr Binary System journal October 2001
Relative stability of LI2, DO22, and DO23 structures in MAl3 compounds journal October 1989
Bandfilling and structural stability of trialuminides: YAl 3 , ZrAl 3 , and NbAl 3 journal June 1991
Deformation and Fracture of L12 Trialuminides. journal January 1991
Criteria for developing castable, creep-resistant aluminum-based alloys – A review journal March 2006
Exploration of D022-Type Al3TM(TM = Sc, Ti, V, Zr, Nb, Hf, Ta): Elastic Anisotropy, Electronic Structures, Work Function and Experimental Design journal April 2021

Similar Records

Thermal stability of L1 sub 2 structured Al sub 3 (Zr sub x V sub 1-x ) in rapidly solidified Al-Zr-V alloys
Thesis/Dissertation · Thu Dec 31 23:00:00 EST 1987 · OSTI ID:5182293

The effect of scandium on the phase stability of Al sub 3 Nb and Al sub 3 Zr
Conference · Sun Dec 31 23:00:00 EST 1989 · OSTI ID:6389156

Coarsening phenomenon of L1{sub 2} precipitates in rapidly solidified Al-3at%(Ti, V, Zr) system
Journal Article · Fri Sep 01 00:00:00 EDT 1995 · Scripta Metallurgica et Materialia · OSTI ID:105939

Related Subjects