Creep properties of coarse-grained Al(Sc) alloys at 300°C

被引：79

作者：

Fuller, CB ^{[1
]}

Seidman, DN ^{[1
]}

Dunand, DC ^{[1
]}

机构：

[1] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA

来源：

SCRIPTA MATERIALIA | 1999年 / 40卷 / 06期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S1359-6462(98)00468-0

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The dislocation creep behavior of coarse-grained binary AlSc alloys was studied. The presence of coherent Al3Sc precipitates within the aluminum matrix was observed in the Al-0.07 wt.% Sc specimen. The Al3Sc precipitates were coherent with a mean size of 26±2 nm and were present a number density of (2.4±0.9)×1014 cm-3. The AlSc alloys exhibited a threshold stress which was dependent on the volume fraction and size of the precipitates.

引用

页码：691 / 696

页数：6

共 19 条

[1]

[Anonymous], 1994, MECH PROPERTIES META

[2] DIFFRACTION CONTRAST FROM SPHERICALLY SYMMETRICAL COHERENCY STRAINS [J].

ASHBY, MF ;

BROWN, LM .

PHILOSOPHICAL MAGAZINE, 1963, 8 (91) :1083-&

[3] CONSTITUTION AND AGE HARDENING OF AL-SC ALLOYS [J].

BLAKE, N ;

HOPKINS, MA .

JOURNAL OF MATERIALS SCIENCE, 1985, 20 (08) :2861-2867

[4]

Chakrabarti DJ, 1998, SUPERPLASTICITY AND SUPERPLASTIC FORMING 1998, P155

[5]

Drits MY, 1984, Phys Met Metallogr, V57, P118

[6]

Elagin V.I., 1992, METALLOGRAPHY HEAT T, V1, P24

[7]

Frost H.J., 1982, DEFORMATION MECH MAP, P26

[8] HOMOGENEOUS NUCLEATION KINETICS OF AL3SC IN A DILUTE AL-SC ALLOY [J].

HYLAND, RW .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1992, 23 (07) :1947-1955

[9] High strain rate superplasticity in an Al-Mg alloy containing scandium [J].

Komura, S ;

Berbon, PB ;

Furukawa, M ;

Horita, Z ;

Nemoto, M ;

Langdon, TG .

SCRIPTA MATERIALIA, 1998, 38 (12) :1851-1856

[10] A simple procedure for estimating threshold stresses in the creep of metal matrix composites [J].

Li, Y ;

Langdon, TG .

SCRIPTA MATERIALIA, 1997, 36 (12) :1457-1460

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