Structural evolution during mechanical alloying of alumnium-iron powders

Powder production ION BEAM

PROCESSING

Fundamentals OF POWDERS

MODELLING METAL

11.1~.Mullet-, W.J. Ensinger. Ion

‘of powders

is rcvie~rvrd with

to

regard

to

Dutton

Force

ct

Rase,

al.

Ohio.

(Wright-Patterson

Air

Melnl(.

Matrr.

ITSA)

to agitate surfaces

the powder to expose t,) the ion beam.

conducted

using

a continuum

Methods.

including

ion

and

rultb

modified

ion

assisted

Results,

deposition,

concerning

annealing, discussed.

art>

and

dcscribrd.

tadiation

doping and Some examples

Modclling flow

tnicrostructurc consolidation

damage,

properties. arc given.

are

and

ATOMIZATION/

a stress

Poisson‘s

SUBSTRATE

QUENCHING

SOLIDIFIED

POWDERS

OF RAPIDLY

and

which

depend

crrrp.

The

ct

llniversity. rlvr

(Nattonal Tsing

al.

llsinchu.

MPttrli.,

31. No 2, 1995,

Vol

145-153.

(‘cnt.rifugal atomizal iott and substrate quenching have he6.n combined for production

of flaky

of process

paramrtcrs

struc’turt~

arc described.

30 pm thick are

with

reportt~d.

grains

with

powders

of Al. Effects

on particle Particle

aspcc?

sizes of lo-

ratios

St.ruc~tures

on density.

In sintrt

ratio

tW\*ceen

tnotit~l was

PREDICTION

gi\,es

a

is

Pressing

suggcstcd

COMPRESSION

IN

milling

milling.

.Joslin,

K.1I.G.

Birmingham, Mater.

Asttbcc

(l’nivrrsity

Hirtninghanl.

75x,/s.

A, i-1,1 26.4.

No

01

Mrtcrlf.

IlKi).

5,

19%.

1087-1091. that

or Al alloy powders dimensional time

is

to

to large

Full

are suh,jrctcd

reduced

abrasion

encapsulated

c~omprcssiotr,

attributed lead

when

high

of particle

and

Itigh

is

ARTICLES

mclchanical

USING

GAS DRAINAGE

1994,

Development in which gas during

plasticisers t.o

computer

are ensure

Ijensitirs for Fc hasp

l-6.

pressing used.

is

tafficient

of 7.4-7.7 materials.

of compaction frotn a metal reported.

A porous gas

gm.c’m ” are

The

model mill.

of

betwrcbn

predicted of parking

Pow&r

T~l??rt~f.,

199-205. of

is

ENERGIES

is

and density

is

rt~ported

taxpcrimrntal for random

orirntat.ions

close

and nail rtumbcrs

wcxrc drt,rrmined

loosc~ parking.

a

(i.

compositionally

front

ultrafint,

two-step

has

ltowdrrs

sintcring.

tq

at

fclrmrd

STRUCTURAL

EVOLUTION

MECHANICAL

ALLOYING

ALUMNIUM-IRON

Sttx(?ural

600

during

Properties

DURING OF

POWDERS

c\olution

of Al-(1,

increased O.O25at%

t,hc

reduction.

A1-%5%Fc

M. l!%esterc,i (t.:st,av Materialoveho Slovakia)

Pokrok,t~

Al

crystallinr

rat<,

of

was

ratio

ltarticlr

fully

sizcx

amorphous

and Al-lO.‘i”,,Fe

was a mixturt,

and amorphous in all alloys

phases. F’(tAIzj formt,d excrpt Al-2.5’:5Ft~ which

Ftl,Alr,

consolidated rrtnainrd

after

10.7%

of cystallinrB

rntlling.

and

25’:&

Shock powders

nano-ctystallirtt~.

MICROSTRUCTURES

OF ATOMIZED

ALUMINIUM-CHROMIUM

POWDERS

ANDPROPERTIESOFEXTRUDED POWDERS Kobayashi

et

al.

(Osaka

l:rtivrrstty,

Z. M~tnlbkd. Vol X6, No 4. 19!)5,

powders,

cooling

solubility SAV, Kosice.

in

in the ball to powder

accclcrated

A

M. k&d,

“,,Fc

Fe

in t.hta as-niillr,d

Incrclase

were correlated

Vyskumu

of

from the rqriilibrtum value 01 up to 4.4’:,. Nanometer grains

prcscttt

AI-Cr

ALUMINIUM

mechaniaxl

Solubility

2x9-292. The microstructures ACTIVATION

during

4. 7.13, 10.7 or 26)at

investigated.

K.F.

removal. claimed

that

(’ tn N. AlN was

Japan).

OF DISPERSION

STRENGTHENED

x0

AIN-( Ni, MO or W)

and

contained

random

paltic.lcs

agrermrnt

of cylindrical, bean shaped particles. (‘oordination

DEFORMATION

No

matrix

I :ni\c%r-

(Deakin

non-spherical Good

particle

rcportrd

1000

\:(I1 41.

Mrttrl(.,

madr

powder.

Aluminium

(In Russian.)

of a method is drained

and

Sap

(In .Japanest~.)

material

was

distributions

simulation

for clost~ and

No 11112,

is

alloying

OF NON-

Aust.ralia).

described.

and

~f~)l/.shk”~/,(~,~(~IWnttcllurgiyu.

Powlrr

It

A

for stirred

in a stirrcxd

P.E. Kardnagh

Vol 84. No 3, 1995,

packing shaped

DENSITY

PocPf~Pr

I’ntvcrsity,

). .J. Jc~ptrrt Sec.

.Japan

nori-

PARTICLES

G.T. Nolan

(liokkaido

lIokkaido.

wpr?

valurs

OF HIGH

A.T. Mamadov.

said

PACKING

packittg

surfaces.

METHODS

powder

RANDOM

A

fostrt

are repot-ted.

COMPACTION

size

experitnc~nt~ally

which

lvhich

and

simulated.

was tr5tcd

sit?/, &toria.

This

stresses

forces

cleaning

density

sc~l:onds.

shear

frictional

and

properties

to

to hot bi-

SYSTEM

significant

is proposed

wet-r

of

Al

drnsification

NITRIDE-METALS

of

are ronsidrrcd.

particlc

10 pm

are

stirrrd

thr,sc

model

SPHERICAL

It is reported

I Lttivcrsi1y

grinding

thtarc

and

and

below SM.

ALUMINIUM

with respc>c,t to ball milling and it

brtwc~en

size, energy

METALLURGY

BALL

A,wdw Twh r/r,/..

ultrafine

that

different-rs

BI-DIMENSIONAL

SIZE

(I,uIea

is disc-ttssrd of conventional

stirrrd POWDER

of

along

GRADIENl

IN THE

pressing

1’0184, No 2, 1095. 101.lOti. powders tnodels

c*ellular tnicrogratns.

glide

sinterirtg with no grain growth. and gradient arc drscrihrtl.

Simulation

columnat

intt n-hrrca

In-edorninaic,s

MATERIALS

on a

FOR A STIRRED

I>ulra, Swcbdcn)

’ hi

Umol

drfortnat

’ for dislocaticln

1994. 639-643.

sintc,ring

validated

OF PRODUCT

1;. Forssbcrg

Tcchnol..

speed

botindaric5.

graded

DISTRIBUTIONS MILL

of 2X-700

arc

grain

been

M. Gdo,

size and

slip mcchattism

326 liJ.tnol

pot-o,

Hua

Int. .J. I%U-

Taiwan).

a dislocation

K. Atarashiya

with

r-dngrb of‘ nratrrials. K.E’. Shut

at 340

high

Al-

Aclivatiort

fack)r

vary

Poisson’s

of ~omprtitiott

arc’ calculated

FUNCTIONALLY

incorporate

It is shown that described I,>, two

intensification

of ceramics

nieasurc

iott was

01 stntrretl

dt~scribt~d.

yield fttnct.ion to

ratio

and

forging

consolidat

effects. can bc

parameters, tnaterial

CENTRIFUGAL

of powder

at-r

temperature and

7Yrtu.s. A, \‘ol %A, No 8. 1995. 203 l-%)51.

the need untreated

implant,ation

of dt~formation

Xvol’lc,Al:,(!, c~nergies

R.E.

t reatmettt

btam

Studies

OF

POWDERS

J ,Wc~tccIs,Vool 47,

No 4, 199.5, ‘O-26. tnodif;v surfaces

HOT CONSOLIDATION

AND CERAMIC

extruded strengths

made with

rate of

of about

Al- (2

t,o

of raJ,idly by gas

solidified

atomization,

“,,(:r attcl cooling 103deg,src :%‘:,(‘r 4)‘!,(‘r

rate.

gave in had

Al.

a llot

tc>nsilcl

of 21iW:WJ MPa.

MPR March 1996 37