Conclusions
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1.
The mechanical properties of semifinished products from SAP depend both on the structure and the condition attained by the initial aluminum hydroxide in the course of its transformation.
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2.
The vacuum treatment of cold-pressed compacts and the degassing of aluminum powder in an inert medium under the same temperature and time conditions ensure identical mechanical properties.
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3.
The degassing of powders and cold-pressed compacts in air is unable to achieve the desired quality of semifinished products.
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4.
Heating in an oxidizing medium at 450–640°C is accompanied by continuous oxidation, which affects the mechanical properties of the material.
-
5.
The relationship existing between the structure of the aluminum oxide forming under different atmosphere and temperature conditions and the mechanical properties of semifinished products opens up possibilities for controlling these properties. To achieve stable properties in semifinished products, stable technology is required ensuring a uniformity of structural transformations in the material.
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Translated from Poroshkovaya Metallurgiya, No. 10 (82), pp. 85–92, October, 1969.
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Litvintsev, A.I. Influence of the method of manufacture on the structure and properties of SAP semifinished products. Powder Metall Met Ceram 8, 842–848 (1969). https://doi.org/10.1007/BF00778348
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DOI: https://doi.org/10.1007/BF00778348