IN-SITU OBSERVATION OF PARTIAL MELTING IN SUPERPLASTIC ALUMINUM-ALLOY COMPOSITES AT HIGH-TEMPERATURES

被引：23

作者：

KOIKE, J

MABUCHI, M

HIGASHI, K

机构：

[1] OREGON STATE UNIV, DEPT MECH ENGN, CORVALLIS, OR 97331 USA

[2] GOVT IND RES INST, KITA KU, NAGOYA, AICHI 462, JAPAN

[3] UNIV OSAKA PREFECTURE, COLL ENGN, DEPT MECH SYST ENGN, SAKAI, OSAKA 593, JAPAN

来源：

ACTA METALLURGICA ET MATERIALIA | 1995年 / 43卷 / 01期

关键词：

D O I：

10.1016/0956-7151(94)00220-C

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The possibility of partial melting and its relations to the superplasticity at high strain rates were studied with transmission electron microscopy and differential scanning calorimetry in Al-Cu-Mg (2124), Al-Mg (5052), and Al-Mg-Si (6061) alloys reinforced with Si3N4 particles. Calorimetry measurements of all three composites showed a sharp endothermic peak at an optimum superplastic temperature. At the same temperature, transmission electron microscopy showed the melting of grain boundaries and interfaces, suggesting direct correlations between partial melting and the superplasticity. Solute segregation was also observed at boundaries and interfaces, and was discussed as causes for partial melting.

引用

页码：199 / 206

页数：8

共 42 条

[1]

[Anonymous], 1990, METALS HDB, V2

[2] HEATING RATE EFFECTS ON RECRYSTALLIZED GRAIN-SIZE IN 2 AL-ZN-MG-CU ALLOYS [J].

BAMPTON, CC ;

WERT, JA ;

MAHONEY, MW .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1982, 13 (02) :193-198

[3]

CHOKSHI AK, 1988, SUPERPLASTICITY AERO, P653

[4]

CLRKE DR, 1992, MATERIALS INTERFACES, P255

[5]

Edington J. W., 1976, PROG MATER SCI, V21, P61

[6]

FRANCZKIEWICZ A, 1985, J PHYS C SOLID STATE, V4, P497

[7] DEFORMATION TWINNING IN AL-4.8 WT-PERCENT MG [J].

GRAY, GT .

ACTA METALLURGICA, 1988, 36 (07) :1745-1754

[8]

Hamilton C.H., 1982, SUPERPLASTIC FORMING, P173

[9] SUPERPLASTICITY IN beta-SILICON NITRIDE WHISKER-REINFORCED 2124 ALUMINIUM COMPOSITE [J].

IMAI, T ;

MABUCHI, M ;

TOZAWA, Y ;

YAMADA, M .

JOURNAL OF MATERIALS SCIENCE LETTERS, 1990, 9 (03) :255-257

[10]

IMAI T, 1990, METAL & CERAMIC MATRIX COMPOSITES : PROCESSING MODELING & MECHANICAL BEHAVIOR, P235

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