2013年
Bulky averaged microscopic information for ecap-processed cu using accelerator-based gamma-ray-induced positron annihilation spectroscopy and neutron diffraction
Materials Transactions
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- 巻
- 54
- 号
- 9
- 開始ページ
- 1562
- 終了ページ
- 1569
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.2320/matertrans.MH201310
Bulky averaged microstructural parameters such as vacancy density, texture and intergranular stress for 99.99% Cu subjected to equalchannel angular pressing (ECAP) were investigated using accelerator-based gamma-ray-induced positron annihilation spectroscopy (AIPAS) and neutron diffraction. The Doppler-broadening parameter S for the AIPAS positron annihilation peaks increased after the first ECAP cycle and then decreased slightly with additional ECAP cycles. When the samples were annealed, the S value for the sample subjected to eight ECAP cycles was found to decrease at a lower temperature than that for the sample subjected to one ECAP cycle. The texture and intergranular stresses generated by ECAP were determined by neutron diffraction analyses. Changes in full width at half maximum and intensity of the (111) and (200) neutron diffraction peaks monitored in situ during annealing indicated the early onset of recrystallization in the sample subjected to eight ECAP cycles. These bulky averaged data show good agreement with both local scanning electron microscopy/electron backscatter diffraction observations and the results of mechanical tests. © 2013 The Japan Institute of Light Metals.
- リンク情報
- ID情報
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- DOI : 10.2320/matertrans.MH201310
- ISSN : 1345-9678
- SCOPUS ID : 84883235430
- Web of Science ID : WOS:000325713000005