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

Effect of heterogeneous microstructure on the tensile and creep performances of cast Haynes 282 alloy

Journal Article · · Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
Precipitation-strengthened Ni-based superalloys are leading candidate materials for advanced ultra-supercritical (A-USC) plants with steam conditions up to 760 °C (1400 °F) and 35 MPa (5 ksi). This study evaluates representative specimens from a large casting of Haynes 282 to study the effect of microstructural heterogeneity on the mechanical behavior of this alloy. The tensile test results of cast Haynes 282 over the temperature range 20–816 °C exhibited lower tensile strength and ductility in comparison with the reference wrought Haynes 282. However, the creep rupture tests of the cast alloy below 704–788 °C and 190–431 MPa presented a similar stress-Larson-Miller parameter to that of the wrought material. Microstructural and dislocation characterizations using scanning electron microscopy, conventional transmission electron microscopy, and scanning transmission electron microscopy in conjunction with energy dispersive X-ray spectroscopy were performed to understand the microstructural evolution before and after the mechanical tests. The heterogeneous microstructures of the cast Haynes 282 material, including the coarse grains, potential casting defects, and a bimodal size distribution of γ' precipitates, were detrimental to the tensile behavior, whereas the coarse-scale grains had a positive effect on the creep performance because diffusional creep was the dominant creep mechanism.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Fossil Energy (FE); USDOE Office of Fossil Energy and Carbon Management (FECM)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1836452
Alternate ID(s):
OSTI ID: 1868828
Journal Information:
Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing, Journal Name: Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing Journal Issue: N/A Vol. 828; ISSN 0921-5093
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (17)

Tensile Properties and Deformation Mechanisms of Haynes 282 at Various Temperatures journal February 2018
Fatigue Crack Growth Behavior of Nickel-base Superalloy Haynes 282 at 550-750 °C journal July 2015
Gamma Prime Stability in Haynes 282: Theoretical and Experimental Considerations journal September 2015
HAYNES 282 alloy book January 2017
Compositional variations for small-scale gamma prime (γ′) precipitates formed at different cooling rates in an advanced Ni-based superalloy journal February 2015
On the prediction of the yield stress of unimodal and multimodal γ ′ Nickel-base superalloys journal October 2015
Casting defects and high temperature fatigue life of IN 713LC superalloy journal August 2012
Influence of cooling rate on the development of multiple generations of γ′ precipitates in a commercial nickel base superalloy journal September 2011
Low ductility at intermediate temperature of Ni–base superalloy M963 journal August 2004
Tensile properties of an AlCrCuNiFeCo high-entropy alloy in as-cast and wrought conditions journal January 2012
Influence of heat treatment on the microstructure and tensile properties of Ni-base superalloy Haynes 282 journal January 2017
Contrasting roles of Laves_Cr2Nb precipitates on the creep properties of novel CuCrNbZr alloys journal March 2020
Precipitation behavior near shrinkage porosity in a large sand casting of Haynes 282 alloy journal March 2021
Single-step aging treatment for a precipitation-strengthened Ni-based alloy and its influence on high-temperature mechanical behavior journal March 2019
Imaging with STEM Detector, Experiments vs. Simulation journal June 2015
Mechanism of Intermediate Temperature Embrittlement of Ni and Ni-based Superalloys journal July 2012
Creep and Relaxation Behavior of lnconel-617 journal August 1984

Similar Records

Microstructure and mechanical properties of friction stir welded Haynes 282
Journal Article · Tue Oct 26 20:00:00 EDT 2021 · Materials Characterization · OSTI ID:1908804

Effects of applied stress and grain size on creep-rupture lifetime prediction for Haynes 282 alloy
Journal Article · Sun Feb 06 19:00:00 EST 2022 · Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing · OSTI ID:1845775

Laser Powder Bed Fusion Manufactured Alloys 625 and 282 and Properties Relevant to Advanced Nuclear Components
Technical Report · Mon Jun 30 20:00:00 EDT 2025 · OSTI ID:3002311