実用6000系アルミニウム合金中のマグネシウムとけい素の完全固溶温度
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概要
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Mg and Si contents in mass% written as {Mg} and {Si} was read out from solid solubility isotherms in Al rich corner of Al–Mg–Si phase diagram recommended by Willey. The Mg richer side than locus of apex for (Al) –Mg2Si– (Si) three phases region was named as region A and another side richer in Si than the locus as region B. Relation between complete dissolution temperature TCD and the Mg and Si contents in the region A can be written asln [ {Mg} 1.73 {Si} ] = (12.1±0.2) − (1.06±0.01) ×104/TCD .In the region B, writing linear relation between {Mg} and {Si} as {Mg} =α {Si} +βand under assumption that the β shows an Arrhenius type temperature dependence, a relationln [ {Mg} +2.43 {Si} ] = (8.16±0.03) − (5.77±0.03) ×103/TCDwas obtained. Tracing change in resistivity with temperature of heat treatment, the TCD of commercial alloys was experimentally estimated. Experimental TCD values well coincided with calculated values in 6N01, 6151 and previously investigated 6063 alloys which are low contents in the region A. However, perhaps because of existence of coarse Mg2Si particles which require long period of high temperature heat treatment to dissolution, high contents 6061 in the region A and 6022 in the region B showed experimental values about 20 K lower than the calculated values.
- 一般社団法人 軽金属学会の論文
一般社団法人 軽金属学会 | 論文
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