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008 130624 2012 my da f m 000 0 eng d
020 _aTHE0005772(Local)
039 9 _a201905101545
_baida
_c201306241203
_dhuda
_y201306241203
_zhuda
040 _aUMP
090 _aTA418.7 .H36 2012 rs Bc.
100 0 _aMuhamad Hanif Muhamad
245 1 0 _aEffect of microstructure on plain strain fracture toughness of carbon steel /
_cMuhamad Hanif Muhamad
260 _aKuantan, Pahang :
_bUMP,
_c2012
300 _axvii, 55 p. :
_bill. (some col.) ;
_c30 cm. +
_e1 CD-ROM
502 _aProject paper (Bachelor of Mechanical Engineering) -- Universiti Malaysia Pahang - 2012
504 _aBibliography : p. 54-55
520 3 _aThis project is about to study the effect of microstructure on plain strain fracture toughness of carbon steel. The objectives for this project are to study the effect of microstructure on plain strain fracture toughness of carbon steel and to study the effect of transformation structure on fracture toughness (K1C). This project involves preparation 26 specimens of low carbon steel which is the mild steel. Two notch diameters (5.6 mm and 4.2 mm) and two notch angles (α) namely 60° and 80° have been used to observe the fracture toughness of the steel. By full annealing heat treatments process, it can used to differentiate the microstructure of the steel and its effect on the fracture toughness is also observed. Mounting process is done for two of the specimen before observation of the microstructure using Optical Microscope. The tensile test done and the fracture toughness can be getting from the calculation. It has been found that the heat treatment specimens are softer and brittle but for the no heat treatment specimens it is stronger and harder. Fine grained structure improved fracture toughness. Higher notch angles give lower fracture toughness and lower notch diameter gives lower fracture load. For 60° angle, lower notch diameter give higher fracture toughness. For 80° angle, lower notch diameter give lower fracture toughness. Microstructure of steel has the strong influence on the value of K1C. The finer grain structure has been found to have higher value of K1C than a coarse and wider grained structure. Non heat treated samples are stronger and harder but for the heat treatmeent sample it is softer and brittle.
650 0 _aMicrostructure
650 0 _aSurfaces (Technology)
_xAnalysis
999 _aVIRTUA40
_c3876
_d3882
999 _aVTLSSORT0080*0200*0400*0900*1000*2450*2600*3000*5020*5040*5200*6500*6501*9992