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Author Terai, Shiro ♦ Baba, Yoshio
Sponsorship USDOE
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword METALS, CERAMICS, AND OTHER MATERIALS ♦ ALUMINUM ALLOYS ♦ ANNEALING ♦ COTTRELL MECHANISM ♦ DEFECTS ♦ DISLOCATIONS ♦ GRAIN SIZE ♦ HEAT TREATMENTS ♦ INTERMETALLIC COMPOUNDS ♦ IRON ALLOYS ♦ LITHIUM ALLOYS ♦ MANGANESE ALLOYS ♦ MECHANICS ♦ PRECIPITATION ♦ QUENCHING ♦ ROLLING ♦ SILICIDES ♦ SOLID SOLUTIONS
Abstract Experiments were carried out to study the effect of the second phase of metallic compounds on the Work Softening'' phenomenon in Al--Fe, Al--Si, Al-- Mn, and Al--Li alloys. When particles of metallic compounds were dissolved by quenching after solution treatment so that the ingot was in the state of super- saturated solid solution or eutectics, the Work Softening'' phenomenon was not observed in the sheet obtained from this ingot. On the other hand, the Work Softening'' phenomenon was observed in the sheet produced by a process of preheating the ingot followed by an intermediate heat treatment to precipitate a large amount of metallic compounds, when light rolled after final annealing at the temperature of the softening stage. The finer the precipitated particles were, the more distinctively the Work Softening'' phenomenon was observed with no connection with natural or artificial aging after light rolling. Regarding the process of Work Softening'' phenomenon, it cannot be explained by the Cottrell mechanism. Therefore a more thorough investigation in the light of the sub-grain formation by dislocation rearrangement may be required.
ISSN 00214434
Educational Use Research
Learning Resource Type Article
Publisher Date 1962-01-01
Journal Transactions of the Japan Institute of Metals
Volume Number 3
Issue Number 4
Organization Sumitomo Light Metal Industries, Ltd., Japan


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