Research on aging precipitation in a Cu-Cr-Zr-Mg alloy
- 1. College of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072 (China) and College of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003, Henan Province (China)
- 2. College of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003, Henan Province (China)
- 3. College of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072 (China)
Description
The effects of aging processes on the properties and microstructure of Cu-0.3Cr-0.15Zr-0.05Mg lead frame alloy were investigated. Aging precipitation phase was dealt with by transmission electronic microscope (TEM). After solid solution was treated at 920 deg. C and aged at 470 deg. C for 4 h, the fine precipitation of an ordered compound CrCu2(Zr, Mg) is found in copper matrix as well as fine Cr and Cu4Zr. Along the grain boundary, there are larger chromium. The hardness and electrical conductivity can reach 109 HV and 80% IACS, respectively. Sixty percent cold-rolled deformation prior to aging at 470 deg. C enhances the hardness of the alloy. The coherent precipitates Cr in copper matrix and the dislocations pinned by the fine precipitates are responsible for maximum strengthening of the alloy. So the hardness 165 HV and electrical conductivity 79.2% IACS are available
Additional details
Identifiers
- DOI
- 10.1016/j.msea.2004.09.041;
- PII
- S0921-5093(04)01229-8;
Publishing Information
- Journal Title
- Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
- Journal Volume
- 392
- Journal Issue
- 1-2
- Journal Page Range
- p. 422-426
- ISSN
- 0921-5093
- CODEN
- MSAPE3
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 38064311
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- AGING; CHROMIUM; COPPER; COPPER ALLOYS; DEFORMATION; DISLOCATIONS; ELECTRIC CONDUCTIVITY; GRAIN BOUNDARIES; HARDNESS; MICROSCOPES; PRECIPITATION; SOLID SOLUTIONS
- Descriptors DEC
- ALLOYS; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; DISPERSIONS; ELECTRICAL PROPERTIES; ELEMENTS; HOMOGENEOUS MIXTURES; LINE DEFECTS; MECHANICAL PROPERTIES; METALS; MICROSTRUCTURE; MIXTURES; PHYSICAL PROPERTIES; SEPARATION PROCESSES; SOLUTIONS; TRANSITION ELEMENT ALLOYS; TRANSITION ELEMENTS
Optional Information
- Copyright
- Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.