PRECIPITATION AND RECRYSTALLIZATION DURING PROCESSING OF A SUPERPLASTIC AL-10MG-0.1ZR ALLOY

被引：13

作者：

MCNELLEY, TR

CROOKS, R

KALU, PN

ROGERS, SA

机构：

[1] Materials Engineering Program, Department of Mechanical Engineering, Naval Postgraduate School, Monterey

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1993年 / 166卷 / 1-2期

关键词：

D O I：

10.1016/0921-5093(93)90317-8

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Microstructural evolution during thermomechanical processing (TMP) of a superplastic Al-10Mg-0.1Zr (weight per cent) alloy was studied. The TMP was carried out at 300-degrees-C and consisted of 12 rolling passes corresponding to a total strain of 2.5. Superplastic elongations at 300-degrees-C exceeded 1 000% for an optimum processing schedule involving a 30 min interpass anneal (IPA) time. Precipitation of the intermetallic beta-phase (Al8Mg5) was complete at an accumulated strain of 1.5 and the precipitate particle size and size distribution were found to be nearly constant for the remainder of the TMP. Particle stimulated nucleation (PSN) of recrystallization associated with prolonged IPA times accounted for the grain refinement necessary to support superplastic deformation. A model for PSN is applied to the data.

引用

页码：135 / 143

页数：9

共 24 条

[1] CAVITY FORMATION FROM INCLUSIONS IN DUCTILE FRACTURE [J].

ARGON, AS ;

IM, J ;

SAFOGLU, R .

METALLURGICAL TRANSACTIONS, 1975, A 6 (04) :825-837

[2] DEFORMATION OF PLASTICALLY NON-HOMOGENEOUS MATERIALS [J].

ASHBY, MF .

PHILOSOPHICAL MAGAZINE, 1970, 21 (170) :399-&

[3] INITIAL-STAGES OF RECRYSTALLIZATION IN ALUMINUM OF COMMERCIAL PURITY [J].

BAY, B ;

HANSEN, N .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1979, 10 (03) :279-288

[4] USE OF BACKSCATTERED ELECTRON IMAGING TO CHARACTERIZE MICROSTRUCTURES OF A SUPERPLASTIC AL-10MG-0.1ZR ALLOY [J].

CROOKS, R ;

KALU, PN ;

MCNELLEY, TR .

SCRIPTA METALLURGICA ET MATERIALIA, 1991, 25 (06) :1321-1325

[5]

CROOKS R, 1988, SUPERPLASTICITY SUPE, P389

[6]

CROOKS R, 1992, UNPUB

[7]

GORSUCH TR, 1989, THESIS NAVAL POSTGRA

[8] RECRYSTALLIZATION AND SUPERPLASTICITY AT 300-DEGREES-C IN AN ALUMINUM-MAGNESIUM ALLOY [J].

HALES, SJ ;

MCNELLEY, TR ;

MCQUEEN, HJ .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1991, 22 (05) :1037-1047

[9]

HALES SJ, 1990, RECRYSTALLIZATION 90, P231

[10]

HALES SJ, 1988, SUPERPLASTICITY AERO, P61

← 1 2 3 →