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Lecture25and26 - 694w BOUND/QWAL —u,— ”.th um.4.w...

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Unformatted text preview: 694w BOUND/QWAL —u.._..._._.__.,— ”.th um. .-...4......_...w .. ...__. WW..._. .MMHmea—nmw Wawww 0E" CEygEM/VE mama C—b— Boa/vowf WW @er- X-MAS .‘ é» 684w 97E fléGWEflzQU/ GEM} SIZE A/UMBEIQ .- Grain simmres in meiais: (I) a schematic representation. (ii the grain stuctme in brass. and in] fine grain structure in austenitir: steel. In M. the pianar regions inside the grains ate twins, which are discussed in Section 5.3.5. (Smme:ASTM Annual Book of Standards {1990). Section 3, ‘Metais Test Methods and Analytical Hucedwes,‘ E 712. pp. 283—84, Figums 1, 3, 4. Copyright ASTM Reprinted with mission.) ASTM grain sixe Grain diameter (.12qu 359 254 180 fl/WQQQ /S 8 ,4Aj0g) Egan/aur— W752 / 6576/9; Mo 45323 V959,?“ % (/4 SSW-é? Saw/GEE @éAz/u Jim/2;) u... 689w 92; #vag— (om-o. RANAE DEERE . Angle of misalignment s:- A. a'i'igzesezezgezq {,0 g 0050- 01 .+ _ w 910‘. 304-5- ? § .. «j ,_ . .1 6 .5 I. | $. ‘ J" \‘,\ .9696- .. $39!] High-angle p‘* X/ “1;"! 1.16] grain boundary - 7‘ '9‘ “T“‘rhmw 5.“ v83 I "w "'3' , ' Low-angie .’ § . $ ‘ *1 grain boundary “3 p"; '3 " <5 Angle of misalignment Eutectic gmmh d lrect Ion W.“ W a 5 7 m C /.HuQV/“ a o WCX a m m m m m 5/ .‘. N M HPUEEEEEah @2an HQ 0%: 75 M m .. m m m _ s M 943“ ,w pa 5 5 Cl /5 m #5 m m m new HULEHNEQEmh _ 8L EBEKEB #095 fox/PW /%AS,A:’ Diégwwg (mama/7‘ 73%; WJSflaé/wmj WE @2370 Page; Dzéééfgry qu‘u‘w—A—-‘V——v‘<wmfirmamw" WWW—e WWI/755770 game/u .- /‘"\ _MWE : Fg—C W455“ OMW‘ —-—+>&3 7m. 45 Consider the pen'tectic system illustrated in Figure 7.5 —.3. Determine the composition and relative AN W645; amounts of each phase present just above and just below the peritecn‘c isotherm for each of the three alloy compositions indicated. X1=0.125wL%C X2=0.17 wt.%C x3=035m fire Weight percentage when / £55 WMQE/flw WVQév/Né— $40—26 504/0 __7WE Haw-- 6349600 szswr (53,51) M.Wmmummu ’ Compasition (at% C) 16000 5 , 10 15 20 25 1400 2500 mm ‘ f,¢#‘“‘# E5 at E! 2000 E B E! E 1000 5 a ., a .5 l ,5 800 I 1500 600 Cementite ( Fe 30} 1000 400 "“ 0 2 3 4 N. 5 6 6.70 (Fe) Composition (M96 C) ...
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