Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Ian Chesser"'
Autor:
Ian Chesser, Yuri Mishin
Publikováno v:
Communications Materials, Vol 3, Iss 1, Pp 1-10 (2022)
Grain boundary self-diffusion mechanisms are not well understood, especially at intermediate temperatures most relevant to engineering applications. Here, molecular dynamics simulations at intermediate temperatures reveal strongly intermittent grain
Externí odkaz:
https://doaj.org/article/35f79ccd43aa4189bc4c789774f757fc
Autor:
Gregory S. Rohrer, Ian Chesser, Amanda R. Krause, S. Kiana Naghibzadeh, Zipeng Xu, Kaushik Dayal, Elizabeth A. Holm
Publikováno v:
Annual Review of Materials Research. 53
Grain boundaries in polycrystalline materials migrate to reduce the total excess energy. It has recently been found that the factors governing migration rates of boundaries in bicrystals are insufficient to explain boundary migration in polycrystals.
Atomistic computer simulations are applied to investigate the atomic structure, thermal stability, and diffusion processes in Al-Si interphase boundaries as a prototype of metal-ceramic interfaces in composite materials. Some of the most stable orien
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5c658927b559d3b52beedfd54b85ca54
http://arxiv.org/abs/2301.11172
http://arxiv.org/abs/2301.11172
Recent grain growth experiments have revealed that the same type of grain boundary can have very different mobilities depending on its local microstructure. In this work, we use molecular dynamics simulations to quantify uncertainty in the reduced mo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::54ad232cf45c0d75506b51f5d5f01ebc
http://arxiv.org/abs/2211.08640
http://arxiv.org/abs/2211.08640
Autor:
Yuri Mishin, Ian Chesser
Publikováno v:
Communications Materials. 3
Grain boundary diffusion in polycrystalline materials is a physical phenomenon of great fundamental interest and practical significance. Although accelerated atomic transport along grain boundaries has been known for decades, atomic-level understandi
Publikováno v:
Acta Materialia. 195:209-218
With the proliferation of grain boundary data in materials science from both experiments and simulations, tools are needed to explore the five dimensional space of grain boundaries and visualize and fit structure property relationships along arbitrar
Publikováno v:
Acta Materialia. 183:207-215
Severe plastic deformation is a widespread method of making high-performance metallic materials. Single-phase polycrystalline metals undergoing severe plastic deformation develop steady-state textures that are characteristic of the mode of deformatio
Atomistic simulations provide the most detailed picture of grain boundary (GB) migration currently available. Nevertheless, extracting unit mechanisms from atomistic simulation data is difficult because of the zoo of competing, geometrically complex
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::71eaf275be9bfd7d83d3fe1bc978d92a
http://arxiv.org/abs/2108.09340
http://arxiv.org/abs/2108.09340
Publikováno v:
Acta Materialia. 175:55-65
Synthetic driving force molecular dynamics simulations were utilized to survey grain boundary mobility in three classes of incoherent Σ3 twin boundaries: , , and tilt boundaries. These boundaries are faceted on low energy planes, and step flow bound
Publikováno v:
Acta Materialia. 166:135-147
We propose a representation of grain boundaries on the unit octonion 7-sphere. This representation comes with algebraic and computational tools for comparing and interpolating between grain boundaries. We derive a geodesic metric based on the inner p