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العنوان
Isothermal Transformation in Eutectoid Steel /
المؤلف
Ibrahiem, Azza Azab Ibrahiem.
هيئة الاعداد
باحث / عزة عزب ابراهيم ابراهيم
مشرف / أ.د/ محمود حسن عبدالله
مشرف / أ.د/ عادل ذكى محمد
مناقش / أ.د/ محمود حسن عبدالله
الموضوع
Isothermal transformation diagrams. Isothermal transformation diagrams. Steel- Analysis.
تاريخ النشر
2011.
عدد الصفحات
97 p. :
اللغة
الإنجليزية
الدرجة
ماجستير
التخصص
الفيزياء وعلم الفلك
تاريخ الإجازة
1/1/2011
مكان الإجازة
جامعة الزقازيق - كلية العلوم - الفيزياء
الفهرس
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Abstract

A e ute c toid s te e l c onta ining nomina lly 1 w t. % N i a nd 1. 05 w t. % C r, 0. 12 w t. % M n ba la nc e Fe w a s s upplie d in the form of s hort c irc ula r rods . Spe c ime ns w ith 21 mm dia me te r, a nd 1. 5 mm thic k, e a c h s pe c ime n w a s drille d a nd a t ta c he d to a le ngth of te mpe ra ture re s is ta nt w ire . All s pe c ime ns w e re a us te nitiz e d a t 1000
o
C for 25 min in a dry a rgon a tmos phe re . Sa mple s w e re the n is othe rma lly tra ns - forme d into Tin ba th for diffe re nt time s a t te mpe ra ture ra nge 280 -580
o
C be fore que nc hing in w a te r. The s ta rt a nd e nd time s for tra ns forma tion w e re de te rmine d by optic a l e xa mina tion of s pe c ime ns e tc he d w ith 2% N ita l. Ba inite mic ros truc ture w a s s tudie d us ing optic a l, s c a nning a nd tra ns mis s ion e le c tron mic ros c opy. The s tudy w ill inc lude the e ffe c t of the ma ximum he a ting te mpe ra ture on the a us te nite gra in s iz e . Als o, the time s for the s ta rt a nd e nd of the ba inite re a c tion a re pre s e nte d a nd its know n a s T. T. T. dia gra m or the kine tic s of ba inite forma tion.
G row th ra te w e re me a s ure d from ba inite pre c ipita te s a round the gra in bounda rie s by us ing the optic a l mic ros c ope . Als o, the a us te nite s ta bility ba y re gion w a s s tudie d by TEM a nd c la s s ifie d into thre e re gions to follow the c ha nge s in its mic ros truc ture w ith the is othe rma l tra ns forma tion te mpe ra ture . The dis tribution of N i a nd C r be tw e e n ba inite a nd the ma trix w a s s tudie d by SEM e quippe d w ith ED S. Fina lly, the mic roha rdne s s a nd the fe rrite la th w idths w e re me a s ure d by mic roha rdne s s te s te r, a nd SEM . The ba inite s he a ve w a s s tudie d by TEM to unde rs ta nd its morphology. All our re s ults c ompa re d to pre vious s tudie s to s e e to w ha t e xte nd our re s ults a gre e d or not w ith the pre vious w ork in lite ra ture .