Mitigating grain growth in binary nanocrystalline alloys through solute selection based on thermodynamic stability maps

Darling, Kristopher A.; Tschopp, Mark A.; VanLeeuwen, Brian K.; Atwater, Mark A.; Liu, Zhe

doi:10.1016/j.commatsci.2013.10.018

Cited by 116 publications

(84 citation statements)

References 64 publications

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“…In general, two approaches are used to reduce the velocity of a moving grain boundary (and stabilize the grain structure): 45 by kinetically hindering GB mobility or by thermodynamically lowering the GB energy through solute segregation (i.e., modifying either the kinetic parameter M or the thermodynamic driving force P, respectively). 24,40,[46][47][48][49][50][51][52][53][54][55][56][57][58] These two approaches are often referred to as the thermodynamic approach and kinetic approach. Because grain boundary mobility follows an Arrhenius behavior, kinetic approaches for reducing grain boundary mobility will eventually be overcome by temperature.…”

Section: Advantages: Grain Refinement Mechanismmentioning

confidence: 99%

“…Recently, a number of models have been derived that look at these effects independently and the combined effect for systems in which both methods of stability could operate. [46][47][48][49][50][51][52][53][54][55][56][57][58][59] …”

Section: Advantages: Grain Refinement Mechanismmentioning

confidence: 99%

“…57 These different models use slightly different approaches to the analytical representations of grain boundaries (i.e., a more simplified grain boundary model 57 versus broken bond models and bond interaction energy distributions 50,51,59,101 ) but are driven largely by accessible materials properties-the enthalpy of mixing and the elastic or segregation enthalpy of the alloying element. In many cases, these models have been validated against TEM and/ or x-ray diffraction data of the stabilized grain size as a function of annealing temperature (e.g., Refs.…”

Section: Modeling and Simulation Approachesmentioning

confidence: 99%

“…(left) Thermodynamic stability map for stabilizing nanocrystalline copper at 0.6T m where the red and black dots indicate the stabilizing and nonstabilizing solutes with respect to the elastic enthalpy and enthalpy of mixing. 57 (right) Molecular dynamics simulations at 1200 K indicate that nanocrystalline Cu rapidly coarsens, 29 while Ta precipitates in the Cu-5%Ta sample stabilize the surrounding nanocrystalline grain size.…”

Section: Modeling and Simulation Approachesmentioning

confidence: 99%

“…51,57,58 As an example of a thermodynamic stability map, Fig. 7 shows a map for nanocrystalline Cu, in which the red and black dots denote the stabilizing and nonstabilizing solutes, respectively.…”

Section: Modeling and Simulation Approachesmentioning

confidence: 99%

See 4 more Smart Citations

“Bulk” Nanocrystalline Metals: Review of the Current State of the Art and Future Opportunities for Copper and Copper Alloys

Tschopp

Murdoch

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et al. 2014

JOM

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It is a new beginning for innovative fundamental and applied science in nanocrystalline materials. Many of the processing and consolidation challenges that have haunted nanocrystalline materials are now more fully understood, opening the doors for bulk nanocrystalline materials and parts to be produced. While challenges remain, recent advances in experimental, computational, and theoretical capability have allowed for bulk specimens that have heretofore been pursued only on a limited basis. This article discusses the methodology for synthesis and consolidation of bulk nanocrystalline materials using mechanical alloying, the alloy development and synthesis process for stabilizing these materials at elevated temperatures, and the physical and mechanical properties of nanocrystalline materials with a focus throughout on nanocrystalline copper and a nanocrystalline Cu-Ta system, consolidated via equal channel angular extrusion, with properties rivaling that of nanocrystalline pure Ta. Moreover, modeling and simulation approaches as well as experimental results for grain growth, grain boundary processes, and deformation mechanisms in nanocrystalline copper are briefly reviewed and discussed. Integrating experiments and computational materials science for synthesizing bulk nanocrystalline materials can bring about the next generation of ultrahigh strength materials for defense and energy applications.

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Section: Advantages: Grain Refinement Mechanismmentioning

confidence: 99%

Section: Advantages: Grain Refinement Mechanismmentioning

confidence: 99%

Section: Modeling and Simulation Approachesmentioning

confidence: 99%

Section: Modeling and Simulation Approachesmentioning

confidence: 99%

Section: Modeling and Simulation Approachesmentioning

confidence: 99%

See 3 more Smart Citations

“Bulk” Nanocrystalline Metals: Review of the Current State of the Art and Future Opportunities for Copper and Copper Alloys

Tschopp

Murdoch

Kecskes

et al. 2014

JOM

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Effect of Processing Parameters on the Microstructure of Mechanically Alloyed Nanostructured Al‐Mn Alloys

Darling¹,

Roberts²,

Catalano³

et al. 2015

Advanced Composites for Aerospace, Marine, and Land Applications II

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Metal Alloys for Fusion‐Based Additive Manufacturing

et al. 2018

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Metal additive manufacturing (AM) is an innovative manufacturing technique, which builds parts incrementally layer by layer. Thus, metal AM has inherent advantages in part complexity, time, and waste saving. However, due to its complex thermal cycle and rapid solidification during processing, the alloys well suit and commercially used for metal AM today are limited. Therefore, it is important to understand the alloying strategy and current progress with materials performance to consider alloy development for metal AM. This review presents the current range of alloys available for metal AM, including titanium, steel, nickel, aluminum, less common alloys (including Mg alloys, metal matrix composites alloys, and low melting point alloys), and compositionally complex alloys (including bulk metallic glasses and high entropy alloys) with a focus on the relationship between compositions, processing, microstructures, and properties of each alloy system. In addition, some promising alloy systems for metal AM are highlighted. Approaches for designing and optimizing new materials for metal AM have been summarized.

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Mitigating grain growth in binary nanocrystalline alloys through solute selection based on thermodynamic stability maps

Cited by 116 publications

References 64 publications

“Bulk” Nanocrystalline Metals: Review of the Current State of the Art and Future Opportunities for Copper and Copper Alloys

“Bulk” Nanocrystalline Metals: Review of the Current State of the Art and Future Opportunities for Copper and Copper Alloys

Effect of Processing Parameters on the Microstructure of Mechanically Alloyed Nanostructured Al‐Mn Alloys

Metal Alloys for Fusion‐Based Additive Manufacturing

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