Effect of quenching rate on microstructure formation in Al-Zn-Mg alloy sheet
Creators
- 1. UACJ Corporation, Marketing & Technology Division, Research & Development Center, Nagoya, Aichi (Japan)
- 2. Nagoya University, Graduate School of Engineering, Department of Materials Physics, Nagoya, Aichi (Japan)
- 3. Aichi Synchrotron Radiation Center, Seto, Aichi (Japan)
Description
A phenomenon that Al-6.0%Zn-0.75%Mg alloy sheets furnace-cooled after solution heat treatment had higher strength than water-quenched sheets under specific aging condition was reported. However, the strengthening mechanism related to furnace-cooling had been not clarified yet. In this research, replication test of the strengthening phenomenon of furnace-cooled sheets and the microstructural change during natural aging and artificial aging at 200℃ after furnace-cooling after solution heat treatment was investigated by tensile tests, SAXS measurements, STEM observation and electrical conductivity measurement. The strengthen phenomenon of furnace-cooled sheets was reproduced. In as-furnace-cooled sheets, 2-5 nm clusters which induced lattice strain were observed in LAADF-STEM image apart from atomic number contrast in HAADF-STEM image. The clusters seemed to be generated during furnace cooling. The clusters seemed to cause suppression of reversion and promotion of age hardening in furnace-cooled material. (author)
Additional details
Additional titles
- Original title (Japanese)
- Al-Zn-Mg合金の微細組織形成に及ぼす焼き入れ速度の影響
Identifiers
- DOI
- 10.2464/jilm.73.616;
Publishing Information
- Journal Title
- Journal of Japan Institute of Light Metals (Online)
- Journal Volume
- 73
- Journal Issue
- 12
- Series
- 雑誌名:軽金属
- Journal Page Range
- p. 616-621
- ISSN
- 1880-8018
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 55074572
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- AGING; CHEMICAL COMPOSITION; CRYSTAL LATTICES; HEAT TREATMENTS; MICROSTRUCTURE; PARTICLE SIZE; SMALL ANGLE SCATTERING; SOLUTIONS; SYNCHROTRON RADIATION; TENSILE PROPERTIES; TERNARY ALLOY SYSTEMS; YIELD STRENGTH
- Descriptors DEC
- ALLOY SYSTEMS; BREMSSTRAHLUNG; CRYSTAL STRUCTURE; DISPERSIONS; ELECTROMAGNETIC RADIATION; HOMOGENEOUS MIXTURES; MECHANICAL PROPERTIES; MIXTURES; RADIATIONS; SCATTERING; SIZE
Optional Information
- Notes
- 11 refs., 8 figs., 1 tab.