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Filtering by: Keyword Atom-probe tomography Resource type Dissertation

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Description:: Superalloys strengthened by γ′(L12)-precipitates in γ(f.c.c.)-matrix exhibit superior high temperature mechanical properties and environmental resistance over long periods of operation, making them ideal candidates for aerospace and energy conversion applications. The emerging class of superalloys based on Co-Al-W ternary system was identified with a melting temperature 50-100 ˚C higher than...
Keyword:: Microstructural evolution, Co-based superalloys, Atom-probe tomography, Phase-field, Mechanical properties, and Creep
Subject:: Materials Science
Creator:: Chung, Ding-Wen
Owner:: Scholarly Digital Publishing
Language:: en
Date Uploaded:: 04/29/2020
Date Created:: 2020-01-01
Resource Type:: Dissertation
Alternate Identifier:: etdadmin_upload_717986 and http://dissertations.umi.com/northwestern:14989

Description:: Dilute Al-Sc-Zr-Si-based aluminum alloys retain their strength for long periods of time at elevated temperatures due to a dispersion of nanometric, coherent, and coarsening-resistant Al3(Sc,Zr) (L12 structure) nanoprecipitates that are formed upon aging. These alloys are attractive for replacement of dense steels and costly Ti alloys in the 250–400 °C...
Keyword:: L12 nanoprecipitates, Atom-probe tomography, Coarsening, High-temperature alloys, Creep, and Aluminum alloys
Subject:: Materials Science
Creator:: Michi, Richard Andrew
Owner:: Scholarly Digital Publishing
Language:: en
Date Uploaded:: 04/29/2020
Date Created:: 2020-01-01
Resource Type:: Dissertation
Alternate Identifier:: etdadmin_upload_718569 and http://dissertations.umi.com/northwestern:14999

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