skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Experimental investigation of the ordering pathway in a Ni-33 at.%Cr alloy

Journal Article · · Acta Materialia
 [1];  [1];  [2];  [1];  [3];  [3];  [2];  [4];  [1]
  1. Univ. of North Texas, Denton, TX (United States)
  2. Colorado School of Mines, Golden, CO (United States)
  3. Korean Atomic Energy Research Institute, Daejeon (South Korea)
  4. Argonne National Lab. (ANL), Argonne, IL (United States)
+ Show Author Affiliations

The present study involves a detailed experimental investigation of the concurrent compositional clustering and long-range ordering tendencies in a Ni-33 at.%Cr alloy, carried out by coupling synchrotron-based X-ray diffraction (XRD), transmission electron microscopy (TEM), and atom probe tomography (APT). Synchrotron-based XRD results clearly exhibited progressively increasing lattice contraction in the matrix with increasing isothermal aging time, at 475 degrees C, eventually leading to the development of long-range ordering (LRO) of the Pt2Mo-type. Detailed TEM and APT investigations revealed that this LRO in the matrix is manifested in the form of nanometer-scale ordered domains, and the spatial distribution, size, morphology and compositional evolution of these domains have been carefully investigated. Here, the APT results also revealed the early stages of compositional clustering prior to the onset of long-range ordering in this alloy and such compositional clustering can potentially be correlated to the lattice contraction and previously proposed short-range ordering tendencies.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22), Scientific User Facilities Division; Korea Atomic Energy Research Institute (KAERI); USDOE
Grant/Contract Number:
AC02-06CH11357; 2011-01-K
OSTI ID:
1373405
Alternate ID(s):
OSTI ID: 1323588
Journal Information:
Acta Materialia, Vol. 115, Issue C; ISSN 1359-6454
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 24 works
Citation information provided by
Web of Science

References (22)

Effect of short-range ordering on stress corrosion cracking susceptibility of Alloy 600 studied by electron and neutron diffraction journal January 2015
Fatigue and fracture of a Ni2Cr ordered intermetallic alloy journal May 1992
Effect of Long-Term Aging on the Structural and Phase Stability and Properties of Nickel-Chromium Alloys journal November 2003
The existence of P phase and Ni2Cr superstructure in Ni-Al-Cr-Mo system journal September 1998
Precipitation of an intermetallic phase with Pt2Mo-type structure in alloy 625 journal January 1999
An Experimental Study on the Ordered Alloy Ni2Cr journal January 1969
Atomic ordering in the NiCrFe system journal December 1994
Effect of thermomechanical treatments on short-range ordering and secondary-phase precipitation in NiCr-based alloys journal July 1989
Lattice parameter studies of structure changes of NiCr alloys in the region of Ni2Cr journal July 1982
EXPGUI , a graphical user interface for GSAS journal April 2001
Computation of Ni-Cr phase diagramvia a combined first-principles quantum mechanical and CALPHAD approach journal July 2006
Phase transformations during long-term ageing of NiFeCr alloys in the temperature range 450–600 °C journal May 1995
The effect of ordering on the hydrogen embrittlement susceptibility of Ni2Cr journal November 1980
k-Space symmetry rules for order-disorder reactions journal May 1975
Ordering and topologically close packed-phase precipitation in a Ni–25at.%Mo–5at.%Al alloy journal May 2004
Ordering reactions in an Ni25Mo8Cr alloy journal April 1996
Probing the crystallography of ordered Phases by coupling of orientation microscopy with atom probe tomography journal January 2015
Atomistic modeling of the order–disorder phase transformation in the Ni2Cr model alloy journal December 2014
A sensitivity analysis of the maximum separation method for the characterisation of solute clusters journal May 2011
Statistical analysis of composition fluctuations and short-range order in stoichiometric Ni–Cr–Mo alloys journal September 2013
Effect of chromium addition on the ordering behaviour of Ni–Mo alloy: experimental results vs. electronic structure calculations journal August 2002
Decomposition and ordering processes involving thermodynamically first-order order → disorder transformations journal November 1989

Cited By (2)

Nanoindentation study of short-range ordering journal January 2019
Simulation of solute clusters in metallic systems journal October 2019

Similar Records

Precipitation of coherent Ni{sub 2}(Cr, W) superlattice in an Ni–Cr–W superalloy
Journal Article · Fri Jan 15 00:00:00 EST 2016 · Materials Characterization · OSTI ID:1373405
+3 more
The effect of interstitial carbon on the mechanical properties and dislocation substructure evolution in Fe 40.4 Ni 11.3 Mn 34.8 Al 7.5 Cr 6 high entropy alloys
Journal Article · Tue Nov 01 00:00:00 EDT 2016 · Acta Materialia · OSTI ID:1373405
+3 more
The effect of interstitial carbon on the mechanical properties and dislocation substructure evolution in Fe40.4Ni11.3Mn34.8Al7.5Cr6 high entropy alloys
Journal Article · Thu Sep 01 00:00:00 EDT 2016 · Acta Materialia · OSTI ID:1373405
+3 more

Related Subjects

36 MATERIALS SCIENCE
Ni-based superalloy
atomic ordering
orientation specific APT
synchrotron XRD