Mechanism of Precipitation Hardening in Cu–Be Alloys

• Henmi Zenzo

  Fujitsu Laboratories, Ltd.

• Nagai Takeshi

  Fujitsu Laboratories, Ltd.

書誌事項

タイトル別名

• Mechanism of Precipitation Hardening in Cu–Be Alloys

抄録

Since the Cu–Be alloys have excellent age hardenability, many investigations have been carried out on their characteristics. The X-ray diffraction technique and electrical resistivity measurement were mainly used in earlier work, but recently the use of transmission electron microscopy has contributed greatly to clarify the mechanism of precipitation.<BR>In this study, the Cu–Be alloys were aged for 2 hr at temperatures between 120° and 350°C and the mechanism of precipitation hardening was studied by hardness measurement, optical microscopy and transmission electron microscopy. The results show that the aging sequence of the Cu–Be alloys is α phase→G. P. (I) zone→G. P. (II) zone→γ′ phase→anomalous γ′ phase in the grains and α phase→dilute α phase plus γ phase at the grain boundaries. The γ phase at the grain boundary in both Cu-2%Be and Cu–Be 25 alloys initialy precipitates at the aging temperature of 250°C. Furthermore, the effect of Co on the precipitation hardening was studied by optical microscopy and X-ray microanalysis.

収録刊行物

• Transactions of the Japan Institute of Metals

  Transactions of the Japan Institute of Metals 10 (3), 166-173, 1969

  社団法人 日本金属学会

キーワード

• General Engineering

詳細情報

• CRID: 1390282680095348352
• NII論文ID: 130003484961
• DOI: 10.2320/matertrans1960.10.166
• COI: 1:CAS:528:DyaF1MXkvVeqs7c%3D
• ISSN: 24324701
• ISSN: 00214434
• Web Site: https://www.jstage.jst.go.jp/article/matertrans1960/10/3/10_3_166/_pdf
• 本文言語コード: en
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