IS 14260: Glass and glass-ceramics - Knoop hardness test

9 Pages·1995·1.1 MB·English

by  Bureau of Indian Standards

इंटरनेट मानक
Disclosure to Promote the Right To Information
Whereas the Parliament of India has set out to provide a practical regime of right to
information for citizens to secure access to information under the control of public authorities,
in order to promote transparency and accountability in the working of every public authority,
and whereas the attached publication of the Bureau of Indian Standards is of particular interest
to the public, particularly disadvantaged communities and those engaged in the pursuit of
education and knowledge, the attached public safety standard is made available to promote the
timely dissemination of this information in an accurate manner to the public.
“जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ”
Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru
“The Right to Information, The Right to Live” “Step Out From the Old to the New”
IS 14260 (1995): Glass and glass-ceramics - Knoop hardness
test [PGD 22: Educational Instruments and Equipment]
“!ान $ एक न’ भारत का +नम-ण”
Satyanarayan Gangaram Pitroda
““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee””
“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै”
Bhartṛhari—Nītiśatakam
“Knowledge is such a treasure which cannot be stolen”

IS 14260 : 1995
IS0 9385 : 1990

,* $k- .i$&$j-+ p& -
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Indian Standard
SSALG DNA SCIMAREC-SSALG - KNOOP
SSENDRAH TSET
(
tsriF tnirpeR LIRPA 6991 )
UDC :82./11.666 643.251.871.026

@ SIB 5991
BUREAU OF INDIAN STANDARDS
KANAM ,NAVAHB 9 RUDAHAB HAHS RAFAZ GRAM
NEW IHLED 200011

March 5991 ecirP puorG 2
lacitpO dna lacitamehtaM stnemurtsnI lanoitceS ,eettimmoC ML 02
LANOITAN FOREWORD
sihT naidnI dradnatS hcihw si lacitnedi htiw 0SI 0991:5839 ssalG dna -sicamarec-ssalg poonK
ssendrah ,tset deussi yb eht lanoitanretnI noitazinagrO for noitazidradnatS ,)OSI( saw detpoaa yb
eht uaeruB of naidnI sdradnatS no eht snoitadnemmocer of eht lacitpO dna lacitamehtaM -urtsnI
stnem lanoitceS eettimmoC ML( )02 dna devorppa yb eht thgiL lacinahceM gnireenignE noisiviD
.licnuoC
ehT poonK ssendrah rebmun sesiretcarahc eht ruoivaheb of ssalg dna sicamarec-ssalg gninrecnoc
a tnenamrep egnahc of eht ecafrus retfa noitatnedni htiw a dilos .lairetam sihT si eno of a seires of
sdradnats gnitaler ot eht lacitpo ssalg dna ssalg cimarec .gnitset
ehT txet of 0SI dradnats sah neeb devorppa sa elbatius for noitacilbup sa naidnI dradnatS tuohtiw
.snoitaived niatreC snoitnevnoc era revewoh ton lacitnedi ot esoht esu ni naidnI .sdradnatS noitnettA
si ylralucitrap nward ot eht :gniwollof
)a Comma J( sah neeb desu sa a lamiced rekram elihw ni naidnI sdradnatS eht tnerruc ecitcarp
si ot esu a lluf pots ).( sa eht lamiced .rekram
)b reverehW eht sdrow lanoitanretnI‘ ’dradnatS raeppa gnirrefer ot siht ,dradnats yeht dluohs
eb daer sa naidnI‘ .’dradnatS
IS 14260: 1995
IS0 938!3 : 1990
Indian Standard
SSALG DNA SCIMAREC-SSALG - POONK
SSENDRAH TEST
1 scope
sihT lanoitanretni dradnatS sebircsed eht dohtem fo
tset rof gninimreted eht poonK ssendrah rebmun fo
ssalg dna .scimarec-ssalg
d
ehT poonK ssendrah rebmun seziretcarahc eht -eb
ruoivah fo ssalg dna scimarec-ssalg gninrecnoc a
tnenamrep egnahc fo eht ecafrus retfa noitatnedni Figure 1 - Base area of the indentation produced
htiw a dilos .lairetam by the Knoop indenter
2 Definition, symbol and designation
ehT poonK ssendrah ,rebmun ,KH si lanoitroporp ot
eht tneitouq fo tset ecrof ;I dna eht projected aera
,A fo eht tnehamrep noitatnedni nevig yb laciremun
eulav noitauqe (1):
172,s" 13Q0
Hk= 201,0 +
P
= 201,0
”031
)lnatx.;f27’toc

= 14,229 x y . . )1(
Figure 2 - Knoop indenter
erehw
F si eht tset ,ecrof ni ;snotwen
ehT lobmys HK si :detnemelppus
is eht projected ,aera ni erauqs -emillim
PA
,sert fo eht tnenamrep ;noitatnedni
a) yb a rebmun gnitacidni eht tset ecrof ,desu -xe
desserp ni snotwen deilpitlum yb 201,0 dna
d si eht ,htgnel ni ,sertemillim fo eht gnol
erofereht lauqe ot eht tset ecrof desserpxe ni
noitatnedni .lanogaid
kilogram-force, dna
NOTE 1 The factor 0,102 in numerical value equation (1.)
b) yb a rebmun gnitacidni eht noitarud fo tset ecrof
became necessary through the introduction of the SI-unit
newton for the test force instead of kilogram-force to noitacilppa ni .sdnoces
avoid changing of the value of the Knoop hardness num-
ELPMAXE
ber.
sihT noitatnedni si dedrager sa a thgiarts dimaryp 094 HK 02/1,0 snaem eht poonK ssendrah -mun
htiw a esab aera sa nwohs ni erugif ,1 a gnol -nedni reb 094 HK gnitluser from na deilppa tset ecrof
noitat lanogaid d dna lacitnedi esrevsnart aera -na fo 089,0 7 N x( 201,0 slauqe O-1). sihT tset ecrof
selg ot esoht fo eht retnedni ees( .)2erugif saw deilppa rof 02 .s
1
IS 14290: 5991
0SI 9385 : 1990
3 Prfnclple 4.3 Verification of apparatus
ehT poonK retnedni si decrof yllacitrev otni eht -rus tI si recommended ot tset eht noitcnuf fo eht -drah
ecaf fo a tset nemiceps fo ssalg or scimarec-ssalg ssen retset ,ylraluger gnidulcni eht poonK ,retnedni
yb tnereffid tset secrof rof 02 .s nihtiW a 6 nim doirep yb stnemerusaem fo dezidradnats tset setalp fo
retfa lavomer fo eht ,retnedni eht htgnel fo eht gnol nwonk ,ssendrah ylbareferp made fo .ssalg
noitatnedni ,slanogaid tfel ni eht ,ecafrus era meas-
tcepsnI eht poonK retnedni yllacipocsorcim from
deru gnisu a .epocsorcim
time ot time tcetedot yna breakages or damage ot
eht .segde
4 Apparatus
5 Test specimen
ehT tset ecafrus fo eht nemiceps llahs eb .talf tI llahs
4.1 Hardness tester eb dehsilop-erif or yllacitpo dnuorg dna .dehsilop
ehT ssendrah retset llahs meet eht gniwollof re- yletaidemmI erofeb ,gnitset ti llahs eb dehsilop htiw
:stnemeriuq retaw dna muirec oxide until dry.
4 eht evitaler error fo eht tset ecrof llahs eb ton ehT muminim ssenkciht fo eht nemiceps llahs eb
SO mm.
retaerg naht 1 ;%
b) eht ngised fo eht gnidaol ecived llahs eb hcus
6 Procedure
taht eht retnedni si yllacitrev eerf‘,derewol from
stress dna ,noitarbiv no ot eht ecafrus fo eht tset
ehT ssendrah tset llahs eb deirrac tuo ta a temper-
nemiceps ta a etar fo 02,0( + )50,0 mm/min;
eruta from 81 “C ot 82 “C, sselnu esiwrehto deerga
.nopu
c) eht htgnel fo eht gnol noitatnedni lanogaid llahs
eb elbarusaem htiw na ytniatrecnu ssel naht ecalP eht tset nemiceps no eht egats fo eht -drah
5,0 pm; ssen retset os taht eht tset ecafrus fo eht tset -ceps
nemi seil ni a enalp lamron ot eht sixa fo eht tset
)d eht epocsorcim tnemerusaem llahs eb deirrac ecrof dna eht sixa fo eht retnedni .)dnomaid( gniruD
tuo htiw eht ciremu:Otevitceffe erutrepa fo eht eht ,tset eht tset nemiceps llahs niamer ni siht -isop
evitcejbo desu fo 7,0 ,,’ ; .noit
4 eht thgil desu rof eht tnemerusaem llahs eb naelC eht poonK retnedni yb gnisserp ti otni reppoc
.neerg-wolley or leets fo wol ,ssendrah or yb snaem fo a elbatius
tnevlos ton lufmrah ot eht ssendrah .retset

ETON 2 ehT evitceffe erutrepa’laciremun ylbaborp -fid

fers htiw eht atad no eht .evitcejbo tI si recommended ot ylppA eht tset secrof rof 02 s ot ecudorp eht -nedni
eriuqni tuoba siht from eht rerutcafunam fo eht ssendrah ,snoitat eht gnol lanogaid snoisnemid fo hcihw era
.retset desu ot etaluclac eht poonK ssendrah .rebmun -ruD
gni eht gnitnedni time, on skcohs or snoitarbiv llahs
eb dewolla ot egnahc eht tset .ecrof nihtiW a 6 nim
doirep retfa gnivomer eht tset ,ecrof erusaem eht
4.2 Knoop Indenter
htgnel fo eht gnol noitatnedni lanogaid ,eciwt gnisu
ehT poonK retnedni stsisnoc fo a deppit-dnomaid eht .epocsorcim ehT seulav deniatbo llahs ton reffid
thgir dimaryp htiw a diobmohr esab sa nwohs ni yb more naht 0,2 pm.
erugif ,2 esohw sixa si tnedicnioc htiw eht sixa fo eht
For eht noitanimreted fo eht poonK ssendrah -mun
tset .ecrof ehT poonK retnedni llahs eb fo a epahs
,reb ylppa eht tset ecrof fo 089,0 7 N. oT ecuder -nu
os taht eht rotcaf
ytniatrec gnisira from ylno eno tset ecrof ,eulav
ylppa ni noitidda ot eht tset ecrof fo 089,0 7 N, no eht
5,0 toc F x nat F) = 82,07 x 3wol
same ,yad tset secrof fo owt rehto seulav hcihw era
ton ylekil ot etaerc evissecxe .erutcarf
ni laciremun eulav noitauqe (1) sah a noitaived on
nI eht esac erehw ylno eht tset ecrof fo 089,0 7 N si
retaerg naht 1 .%
,desu taeper eht erudecorp ta tsael evif tnereffid
ehT secaf dna segde fo eht poonK retnedni llahs eb times. For eerht tnereffid tset ,secrof taeper eht
htooms dna eerf from cracks or rehto .stluaf erudecorp ecno eht txen .yad
tI si recommended ot esu ylno poonK sretnedni ylppA eht tnereffid snoitatnedni no eht same tset
hcihw evah neeb deifitrec yb a gnitset .ytirohtua ;nemiceps eht ecnatsid neewteb snoitatnedni llahs

2
IS 14260:1995
IS0 9385:lQQO
eb ta tsael eerht times eht htgnel fo eht trohs -ni 7 Expression of results
noitatned .lanogaid
ehT poonK ssendrah rebmun HK 02/1,0 si detaluclac
nI eht esac taht a tnemerusaem fo eht gnol -atnedni
irom laciremun eulav noitauqe (2)
noit lanogaid si dedepmi yb tsud selcitrap ta eht dne
fo eht noitatnedni lanogaid or fi eht gnirusaem re- 02/1,0KH = 324,1 . . . )2(
stlus fo eno noitatnedni reffid yb more naht 0,2 pm,
d2
siht noitatnedni dna eht stnemerusaem llahs eb re-
.detaep tresnI eht htgnel d, ni ,sertemillim fo eht gnol -ni
noitatned lanogaid deniatbo rehtie yb tcerid meas-
enimreteD eht citemhtira snaem fo eht gnol -nedni
tnemeru or yb noitanimreted from eht thgiarts enit
noitat slanogaid rof hcae noitidnoc fo .noitatnedni
rof a tset ecrof fo 089,0 7 N ni laciremun eulav
noitauqe (2).
nI eht esac erehw eerht seulav fo tset ecrof era
,desu tolp eht stluser no a hparg sa :swollof
8 lest report
tolP eht seulav fo gl ;I no eht assicsba dna eht -lav
seu fo gl don eht .etanidro fI lla eht stnemerusaem ehT tset troper llahs edulcni eht gniwollof -amrofni
erew deirrac tuo ylreporp (for ,ecnatsni on tsud :noit
,selcitrap on evissecxe ,serutcarf ,).cte lla eht stniop
era detautis no a thgiarts .enil ehT 089,0 7 N tniop 4 ecnerefer ot siht lanoitanretnI ;dradnatS
llats eb denimreted from eht thgiarts enil dna desu
sa d rof eht noitaluclac fo eht poonK ssendrah b) epyt dna noitangised fo eht ssalg or eht -ssalg
rebmun gnisu laciremun eulav noitauqe (2) ees(
ceramics;
esualc .)7 Sometimes a tniop si tahwemos trapa
from eht thgiarts ,enil eud ot seitluciffid ni eht lC yrotsih fo eht tset ,nemiceps fi ;nwonk
tnemerusaem fo siht .tniop nI siht ,esac taeper eht
,stnemerusaem gnidulcni a htruof tset .ecrof d) poonK ssendrah rebmun HK 02/1,0 dednuor ot
eht tseraen 01 HK ;02/1,0
)e a tnemetats rehtehw eht poonK ssendrah -mun
reb saw deniatbo yb tcerid tnemerusaem or yb
noitanimreted from eht thgiarts .enil

3
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and gnidnetta ot detcennoc srettam ni eht .yrtnuoc
Copyright
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sihT naidnI dradnatS has neeb depoleved morf toD : .oN ML 20 ( 0220 ,)
Amendments Issued Since Publication
dnemA .oN etaD fo eussI txeT detceffA
UAERUB FO NAIDNI SDRADNATS
:sretrauqdaeH

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