Effect of constrained inter-granular regions on the inverse Hall-petch phenomena

被引：10

作者：

Darling, K. A. ^{[1
]}

Hornbuckle, B. C. ^{[1
]}

Marvel, C. J. ^{[2
,3
]}

Hammond, V. H. ^{[1
]}

Solanki, K. ^{[4
]}

机构：

[1] US Army, Combat Capabil Dev Command Army Res Lab, Army Res Directorate, Met Branch, Aberdeen Proving Ground, MD 21005 USA

[2] Louisiana State Univ, Dept Mech & Ind Engn, Baton Rouge, LA 70803 USA

[3] Lehigh Univ, Dept Mat Sci & Engn, Bethlehem, PA 18015 USA

[4] Arizona State Univ, Sch Engn Matter Transport & Energy, Tempe, AZ 85287 USA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2023年 / 875卷

基金：

美国国家科学基金会;

关键词：

Microstructural stability; Inverse Hall petch; Nanocrystalline; Grain size; CU-TA ALLOY; NANOCRYSTALLINE METALS; MICROSTRUCTURAL EVOLUTION; MECHANICAL-PROPERTIES; CREEP RESISTANCE; STRENGTH; BREAKDOWN; BEHAVIOR; ALUMINUM; NI;

D O I：

10.1016/j.msea.2023.145125

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The paper makes an effort to lay out a critical assessment of grain size and its role in limiting strength gains in stable nanocrystalline (NC) metals. In particular, this study uses copper-tantalum binary alloys, in which the predominate mechanisms of grain boundary sliding and rotation are shut down, to decipher the breakdown of classical Hall-Petch behavior and its underlining mechanisms. Through varying grain sizes and tantalum concentrations, the results show Cu-Ta's strength exceeds the traditional strength limits anticipated when strictly applying smaller grain size translates to greater strength than that from the Hall-Petch relationship for NC Cu. Within this work, we also highlight the consistent linear behavior holding up to the point of losing full crystallinity given this alloy's ability to constrain failures occurring within other non-stabilized NC systems.

引用

页数：7

共 49 条

[1] HALL-PETCH RELATIONS FOR MULTILAYERED MATERIALS [J].