SEMINAR ON MACHINABILITY OF.pptx

8/19/2019 SEMINAR ON MACHINABILITY OF.pptx

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Submitted to:-

Dr. A. Kumar Co – Ordinator, Materials and

System Engineering Design

Course

SEMINAR ON MACHINAI!I"# O$ "I"ANI%M A!!O#


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IN"ROD%C"ION "itanium alloys &a'e re(ei'ed (onsiderable

interest re(ently due to t&eir )ide range o*a++li(ations in t&e aeros+a(e, automoti'e,(&emi(al, and medi(al industries

"&e most (ommon titanium alloy is "iAl./,)&i(& belongs to t&e 0 2 3 alloy grou+ anda((ounts *or more t&an 456 o* t&e titaniumalloy +rodu(tion


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IN"ROD%C"IONOne o* t&e latest de'elo+ed alloys is t&e "i4447, )&i(& (an be &eat treated to &ig&strengt&s, )it& minimum tensile strengt&'alues o* abo'e 8955 Ma

In t&is )e (om+ared t&e ma(&inability o*t&is ne) alloy"i4447 )it& t&e most(ommon titanium alloy "iAl./


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resentation o* t&e titaniumalloys "&e titanium alloy, "i4447, &as a

metastable beta stru(ture and belongs tot&e *amily o* near-beta alloys


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Mi(rostru(ture o* "itaniumalloy


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C&emi(al (om+osition in )eig&t +er(entage *or t&e t)o "i alloys


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E;+erimental +lan and set u+


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ResultsIn order to (om+are t&e ma(&inability o* "iAl./ and "i4447 alloys, t&e *ollo)ing)ere measured and analye *a(e and (utting edge a*ter ma(&ining


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S+e(i=( (utting *or(e ?K (@ and s+e(i=( *eed *or(e ?K >@


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C&i+ analysis

"&e "iAl./ alloy yields transitional (&i+Bat t&e lo)er (utting s+eed (ondition

On t&e (ontrary, t&e (&i+s *rom t&e "i4447alloy &a'e narro) adiabati( s&ear bands ate'ery (utting s+eed


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Ra>e sur*a(e and (utting edgeanalysis

$ig s&o) orn ra>e *a(e o* "iAl./ and

"i4447 during ma(&ining A big amount o* ad&ered material

(om+osed by titanium ?lig&t grey@ andtitanium (arbide ?bla(>@ )as obser'ed on

ea(& insert along t&e (utting edge


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EDA !O"S


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Con(lusions

"&e ma(&inability rate o* "iAl./ is &ig&ert&an t&at o* "i4447

"&ere is a (lose relations&i+ bet)een t&ema(&inability rate and t&e me(&ani(al+ro+erties o* t&e )or> material ,Moeui'alent 'alue as )ell as s+e(i=( (utting*or(e ?K (@, and s+e(i=( *eed *or(e ?K >@

Hig&erK >

andK (

'alues are obser'ed *or "i4447 t&an *or "iAl./ in all t&e (uttings+eed (onditions


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CONI"N%E "&e +resen(e o* adiabati( s&ear bands in

t&e (&i+s o* "i4447 alloy (ould in(rease t&eFu(tuations in t&e me(&ani(al and t&ermalloads o'er t&e tool ra>e *a(e leading to an

a((elerated tool )ear by diGusion )earme(&anism

"&e +resen(e o* (arbon in t&e ad&eredmaterial indi(ates t&at t&e +&enomenon o*

diGusion o* (arbon *rom t&e inserts into t&e)or> material &as ta>en +la(e at t&e tool–(&i+ inter*a(e


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Re*eren(es

Arra


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"HANJ #O%

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SEMINAR ON MACHINABILITY OF.pptx