Coarsening kinetics at 600°C of Al4C3 dispersoids in mechanically alloyed Al-Ti-O-C

被引：11

作者：

Barlow, IC ^{[1
]}

Jones, H ^{[1
]}

Rainforth, WM ^{[1
]}

机构：

[1] Univ Sheffield, Sheffield S1 3JD, S Yorkshire, England

来源：

SCRIPTA MATERIALIA | 2001年 / 44卷 / 01期

基金：

英国工程与自然科学研究理事会;

关键词：

coarsening kinetics mechanical alloying; Al-Ti-O-C material; Al4C3; dispersoids;

D O I：

10.1016/S1359-6462(00)00544-3

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Al4C3 particles in mechanically alloyed Al-0.25wt%C-10vol%TiO2 increased their average length from 72 to 132 nm and width from 14 to 27 nm in 504 at 600 °C. The cube of their equivalent radius increased linearly with time up to 504 h at 600 °C but the observed volumetric rate was about an order of magnitude faster than predicted from bulk diffusion controlled coarsening kinetics. The marked reduction in the coarsening rate observed for heat treatment times>504 h at 600 °C was attributed to the relocation of most Al4C3 particles into the matrix in which dislocation density has been reduced.

引用

页码：79 / 86

页数：8

共 35 条

[1]

ANGUS HC, 1987, P INT C PM AER MAT 2

[2]

[Anonymous], DISPERSION STRENGTHE

[3] COARSENING BEHAVIOUR OF THETA'' AND THETA' PRECIPITATES IN 2 AL-CU ALLOYS [J].

BOYD, JD ;

NICHOLSON, RB .

ACTA METALLURGICA, 1971, 19 (12) :1379-+

[4] INTERPRETATION OF STEADY-STATE CREEP RATE IN MECHANICALLY ALLOYED AL-C-O ALLOYS [J].

DOBES, F ;

KUCHAROVA, K ;

ORLOVA, A ;

MILICKA, K ;

CADEK, J .

ACTA METALLURGICA ET MATERIALIA, 1994, 42 (04) :1447-1455

[5]

ELMAGD E, 1997, ALUMINIUM, V73, P524

[6]

Fujikawa S, 1996, J JILM, V46, P202

[7] THE STRUCTURE AND PROPERTIES OF ALUMINUM-ALLOYS PRODUCED BY MECHANICAL ALLOYING - POWDER PROCESSING AND RESULTANT POWDER STRUCTURES [J].

GILMAN, PS ;

NIX, WD .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1981, 12 (05) :813-824

[8] MECHANICAL ALLOYING [J].

GILMAN, PS ;

BENJAMIN, JS .

ANNUAL REVIEW OF MATERIALS SCIENCE, 1983, 13 :279-300

[9] Microstructure and mechanical properties of three dispersion strengthened aluminium base alloys after extended holding at elevated temperatures [J].

Hambleton, R ;

Jones, H ;

Rainforth, WM .

ALUMINIUM ALLOYS: THEIR PHYSICAL AND MECHANICAL PROPERTIES, PTS 1-3, 1996, 217 :925-930

[10] Dislocation densities, dispersoid identities and the origins of thermal stability and strengthening in three mechanically alloyed aluminium alloys [J].

Hambleton, R ;

Rainforth, WM ;

Jones, H .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1997, 76 (05) :1093-1104

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