An examination of microstructural evolution in a Cu–Ni–Si alloy processed by HPT and ECAP
Creators
- 1. CDTA, Haouch Oukil BP 17 Baba-Hassan, Algiers (Algeria)
- 2. Faculté de Physique, USTHB, BP 32, El-Alia, Dar El Beida, Algiers (Algeria)
- 3. Division of Materials Science and Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133–791 (Korea, Republic of)
- 4. Université de Paris-Sud, ICMMO, UMR CNRS 8182, Laboratoire de physico-chimie de l'état solide, Bâtiment 410, 91405 Orsay Cedex (France)
- 5. Materials Research Group, Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1BJ (United Kingdom)
- 6. Departments of Aerospace and Mechanical Engineering and Materials Science, University of Southern California, Los Angeles, CA 90089-1453 (United States)
Description
Experiments were conducted to evaluate the evolution of hardness and microstructure in a commercial Cu–2.5Ni–0.6Si alloy (in wt%) after processing using High-Pressure Torsion (HPT) at room temperature with an imposed pressure of 6.0 GPa and Equal-Channel Angular Pressing (ECAP) at 423 K using a channel angle of 135°. Hardness measurements, X-ray diffraction and transmission electron microscopy (TEM) were used for microstructural evaluation and the results show a general consistency between these various techniques. The changes in the crystallite size and the dislocation structure as a function of the number of HPT revolutions and ECAP passes are discussed and compared with the results of the TEM observations. The detailed microstructural observations show a gradual evolution with increasing numbers of revolutions and passes with a saturation after 3 turns of HPT but with no saturation attained in ECAP even after 12 passes because of the lower imposed strain
Availability note (English)
Available from http://dx.doi.org/10.1016/j.msea.2013.04.004Additional details
Identifiers
- DOI
- 10.1016/j.msea.2013.04.004;
- PII
- S0921-5093(13)00371-7;
Publishing Information
- Journal Title
- Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
- Journal Volume
- 576
- Journal Page Range
- p. 149-155
- ISSN
- 0921-5093
- CODEN
- MSAPE3
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 45106231
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- DISLOCATIONS; HARDNESS; MICROSTRUCTURE; PRESSING; PRESSURE RANGE GIGA PA; TEMPERATURE RANGE 0273-0400 K; TORSION; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION
- Descriptors DEC
- COHERENT SCATTERING; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; DIFFRACTION; ELECTRON MICROSCOPY; FABRICATION; LINE DEFECTS; MATERIALS WORKING; MECHANICAL PROPERTIES; MICROSCOPY; PRESSURE RANGE; SCATTERING; TEMPERATURE RANGE
Optional Information
- Copyright
- Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.