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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Microstructural Template Consisting of a Face-Centered Cubic Matrix with Ordered Precipitates: Microstructural Evolution and Properties
Presentation Title FCC High-entropy Alloys Strengthened with L12 Precipitates: Alloying Strategies and Highlights
Author(s) Jean-Philippe Couzinie, Thomas Rieger, Jean-Marc Joubert, Mathilde Laurent-Brocq, Guy Dirras
On-Site Speaker (Planned) Jean-Philippe Couzinie
Abstract Scope Since 15 years, the alloy design based on the so called "high-entropy" approach emerges as a powerful tool to develop new materials with enhanced and sometimes unexpected properties. Among the potential material solutions for structural applications, high-entropy alloys based on 3d transition elements with FCC microstructures are promising. However these alloys are currently suffering of poor mechanical properties for temperatures above 800C. A possible way for improving the high temperature mechanical behavior is to consider the (Ni,Co)3(Ti,Al) precipitation. In this framework, a short review of some key results of the topic will be addressed. The different alloying strategies leading to duplex FCC+L12 microstructures will be discussed. More particularly, a part of the presentation will be focused on the high throughput CALPHAD calculations on the Ni-Co-Cr-Fe-Ti-Al senary system, allowing to screen compositions with the desired microstructure. Experimental results on few compositions selected from calculations will be exposed.
Proceedings Inclusion? Planned: Supplemental Proceedings volume


A Nickel-based Superalloy Dual-reinforced by L12 Ni3Al and D022 Ni3V Ordered-fcc Precipitates
Alloying for Corrosion Resistance: the Effect of Manganese and Silicon on a Polycrystalline Nickel-based Superalloy
Coarsening and Creep Behavior of Co-Ni-Al-W-Ti-Ta-B Superalloy with High γ′ Solvus Temperature
Coarsening Kinetics and Mechanical Properties of fcc Compositionally Complex Alloys Strengthened by L12 Precipitates
Correlative High-resolution Characterization of the Early Stages of Precipitation During Direct Aging of Alloy 718
D022 + D022’ Dual-phase Microstructure in As-cast Al-Mo-Ti Alloys
Elevated Temperature Microstructure Evolution and Properties of an Equiatomic CrCoNi Superalloy Containing Al,Ti
FCC High-entropy Alloys Strengthened with L12 Precipitates: Alloying Strategies and Highlights
High Temperature Microstructural Stability Mechanisms Revealed by Microscopy in Al-Cu-Mn-Zr Alloys
Impact of L12-phase Dispersoids on the Hardening Behavior of Multi-phase Strengthened Aluminum Alloys
In-situ Transmission Electron Microscopy Investigation of Continuous Precipitation of Ni3Mo in a Ni-25Mo-8Cr Alloy Formed by Direct Current Magnetron Sputtering
Mapping the Mechanical Property Space of Al-Cu-Mn-Zr (ACMZ) Cast Aluminum Alloys with Superior Microstructural Stability
Nanoscale Precipitation-strengthened Al-Er-Sc-Zr-(V,Nb,Ta) Alloys
Novel fcc-Cu Matrix Based High Temperature Alloys Strengthened by Ordered Precipitates
Novel Microstructural Template Based on Ordered Intermetallic Precipitation in FCC Based Complex Concentrated Alloys
Ordered Precipitates and Mechanical Properties of Nickel-base Superalloys Studied by Analytical Scanning and Transmission Electron Microscopy
Precipitation and Deformation Mechanisms of γ’/γ” Co-precipitates in Alloy 718
Sc-free Nanoprecipitate-strengthened Aluminum Alloys with Exceptional Creep Resistance
Stress Induced Sensitization in HAZ of 304 LN Austenitic Stainless Steel
The Quantitative Model for Heat Treatment Parameters and Gamma Prime Variations on Nickel-base Superalloys

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