Inverse critical strains for jerky flow in Al-Mg alloys

被引：53

作者：

Balík, J

Lukác, P

Kubin, LP

机构：

[1] Charles Univ, Dept Met Phys, CZ-12116 Prague 2, Czech Republic

[2] Off Natl Etud & Rech Aerosp, CNRS, LEM, F-92322 Chatillon, France

来源：

SCRIPTA MATERIALIA | 2000年 / 42卷 / 05期

关键词：

Portevin-Le Chatelier effect; plastic instabilities; aluminium alloys; critical strains;

D O I：

10.1016/S1359-6462(99)00373-5

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This work addresses the critical strains for the onset of jerky flow along a stress-strain curve in constant imposed strain rate. The hypothesis tested is that the initial dislocation density governs the critical strain behavior. For this purpose, the influence of prestrains performed in different conditions is discussed in simple terms.

引用

页码：465 / 471

页数：7

共 14 条

[1]

[Anonymous], 1981, PROGR MAT SCI CHALME

[2] PORTEVIN-LE CHATELIER INSTABILITIES IN AL-3 MG CONDITIONED BY STRAIN-RATE AND STRAIN [J].

BALIK, J ;

LUKAC, P .

ACTA METALLURGICA ET MATERIALIA, 1993, 41 (05) :1447-1454

[3]

BRECHET Y, 1995, ACTA METALL MATER, V43, P995

[4]

COTTRELL AH, 1953, PHILOS MAG, V44, P829

[5]

Estrin Y., 1989, J. Mech. Behav. Mater., V2, P255, DOI [DOI 10.1515/JMBM.1989.2.3-4.255, 10.1515/JMBM.1989.2.3-4.255]

[6] On the critical conditions of the Portevin Le Chatelier effect [J].

Hahner, P .

ACTA MATERIALIA, 1997, 45 (09) :3695-3707

[7] EVOLUTION OF DISLOCATION DENSITIES AND THE CRITICAL CONDITIONS FOR THE PORTEVIN-LECHATELIER EFFECT [J].

KUBIN, LP ;

ESTRIN, Y .

ACTA METALLURGICA ET MATERIALIA, 1990, 38 (05) :697-708

[8] INVERSE BEHAVIOR OF THE ONSET STRAIN OF SERRATED FLOW [J].

KUMAR, S .

SCRIPTA METALLURGICA ET MATERIALIA, 1995, 33 (01) :81-86

[9] Mechanism of serrated flow in binary Al-Li alloys [J].

Kumar, S ;

Krol, J ;

Pink, E .

SCRIPTA MATERIALIA, 1996, 35 (06) :775-780

[10] EFFECT OF DELTA'-PRECIPITATES ON SERRATED FLOW [J].

KUMAR, S ;

PINK, E .

SCRIPTA METALLURGICA ET MATERIALIA, 1995, 32 (05) :749-753

← 1 2 →