Superficial Plastic Deformation due to Surface Finishing Pevealed by Preferential Precipitation in an Aluminium 25 Per Cent Silver Alloy

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概要

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• The surface of Al-25% Ag alloy, solution treated at 570℃ for 3 hr and water-quenched, have been ground by various mechanical operations of surface finishing and aged at 150℃ for 5 hr and at 300℃ for 1 hr respectively, leading to the formation of two kinds of precipitate particles, i.e. G.P. zones and a Widmanastatten structure, respectively. The nature and distribution of precipitate particles thus formed in the surface layers were examined by replica method of electron microscopy. Observations normal and oblique to the surface layers were carried out for the purpose of studying the gradual change of precipitate particles. Scratches are decorated by two kinds of precipitate particles. It is noted that the form of the precipitate particles is different on the side and the bottom of a groove produced by finishing, leading to the conclusion that shearing stresses act principally on the side of the groove, while compressive stresses are predominant on the bottom of it. In the latter case, a normal Widmanstatten structure does not develop, but granular particles are found.

• 社団法人応用物理学会の論文
• 1965-10-15

著者

• Takahashi Noboru

  Yamanashi University

• Kosuge Hiroko

  Yamanashi University

関連論文

• Superficial Plastic Deformation due to Surface Finishing Pevealed by Preferential Precipitation in an Aluminium 25 Per Cent Silver Alloy

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