Discontinuous model combined with an atomic mechanism simulates the precipitated η′ phase effect in intergranular cracking of 7-series aluminum alloys

Ji, Yucheng; Dong, Chaofang; Wei, Xin; Wang, Shen; Chen, Zhanghua; Li, Yong

doi:10.1016/j.commatsci.2019.05.008

Cited by 13 publications

(2 citation statements)

References 35 publications

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“…Song et al 49 reported that excess hydrogen could be quickly captured by the grain boundaries and embrittled the grain boundaries, which caused intergranular failure. Jia et al 50 researched the effect of hydrogen atoms on the cohesive energy of grain boundaries and found that if there was a hydrogen atom at the grain boundaries, its cohesive energy decreased to 13.4% of GB Al-Al . Correspondingly, the resistance to stress corrosion dramatically decreased.…”

Section: Discussionmentioning

confidence: 99%

Influence of Interfacial Stress Produced by MAO on Electrochemical Corrosion and Stress Corrosion Cracking Behavior in 7075 Aluminum Alloy

Qi¹,

Song²,

Wang³

et al. 2022

J. Electrochem. Soc.

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The interfacial stresses of micro arc oxidation (MAO) coated 7075 Al alloy foil samples were measured by a deflection method. The results showed that compressive stresses were generated on the substrate-coating interface of the samples coated for different oxidation times. Electrochemical tests and slow strain rate tensile tests in a 3.5 wt.% sodium chloride solution indicated that the compressive stress played a positive role in corrosion and stress corrosion cracking (SCC) resistance. The findings of this work indicated that the MAO coating can not only act as a protective layer to hinder corrosive solution, but also the compressive stress generated during MAO process can offset part of the external stress and reduce the hydrogen penetration during SCC.

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Section: Discussionmentioning

confidence: 99%

Influence of Interfacial Stress Produced by MAO on Electrochemical Corrosion and Stress Corrosion Cracking Behavior in 7075 Aluminum Alloy

Qi¹,

Song²,

Wang³

et al. 2022

J. Electrochem. Soc.

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“…Based on the first principles, this paper uses the exchange correlation functional GGA and the modified functional PBE. This paper mainly uses matcloud cloud cloud high-throughput cloud computing and screening platform, starting from the most basic components of micro atoms, electrons, ions and energy bands, through high-throughput crystal structure modeling and screening optimization algorithm [5,6]. The electronic structure, electromigration and diffusion of the matrix and the second phase of the material were studied, and the theoretical criteria for the collaborative optimization of the key performance parameters of the matrix and the characteristic microstructure were established.…”

Section: Introductionmentioning

confidence: 99%

High Throughput Calculation and Characteristic Structure Selection of Cu-Cr-Sn Copper Alloy Based on Matclould Platform

Tang¹,

Liang²,

Chen

2022

KEM

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In this paper, high-throughput crystal structure modeling and high-throughput screening optimization algorithm are used to optimize the performance parameters such as characteristic microstructure type, generation conditions, strength and conductivity. The theoretical criterion of multi parameter collaborative optimization and control of key properties of matrix and second phase is established, based on which the optimal composition range of matrix and second phase is determined, which guides high-throughput experimental verification and material screening, and provides basic data for material composition design and structure control. Realize 102 secondary high-throughput parallel computing and screening based on matcloud platform, and calculate and screen the number of candidate material samples ≧106 and other related technologies. Through the functions of online generation, submission and job monitoring of first principle high-throughput jobs, all computing processes are realized automatically, and the computing results are extracted, standardized processed and stored in the database according to certain rules. In this project, the prediction model and process design platform of material composition structure process performance relationship are established according to the dynamic selection parameters of copper alloy structure, pseudopotential recommendation, k-point file generated according to calculation tasks and structure, and the correlation of some other main parameters.

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The Peridigm Meshfree Peridynamics Code

Littlewood

Parks

Foster³

et al. 2023

J Peridyn Nonlocal Model

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Peridigm is a meshfree peridynamics code written in C++ for use on large-scale parallel computers. It was originally developed at Sandia National Laboratories and is currently managed as an open-source, community driven software project. Its primary features include bond-based, state-based, and non-ordinary state-based constitutive models, bond failure laws, contact, and support for explicit and implicit time integration. To date, Peridigm has been used primarily by methods developers focused on solid mechanics and material failure. Peridigm utilizes foundational software components from Sandia’s Trilinos project and was designed for extensibility. This paper provides an overview of the solution methods implemented in Peridigm, a discussion of its software infrastructure, and demonstrates the use of Peridigm for the solution of several example problems.

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Discontinuous model combined with an atomic mechanism simulates the precipitated η′ phase effect in intergranular cracking of 7-series aluminum alloys

Cited by 13 publications

References 35 publications

Influence of Interfacial Stress Produced by MAO on Electrochemical Corrosion and Stress Corrosion Cracking Behavior in 7075 Aluminum Alloy

Influence of Interfacial Stress Produced by MAO on Electrochemical Corrosion and Stress Corrosion Cracking Behavior in 7075 Aluminum Alloy

High Throughput Calculation and Characteristic Structure Selection of Cu-Cr-Sn Copper Alloy Based on Matclould Platform

The Peridigm Meshfree Peridynamics Code

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