000 04309ntm a2200385 i 4500
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003 KUKTEM
005 20251117113400.0
008 180306s2017 my da f am 000 0 eng d
020 _aTHE0005250(Local)
039 9 _a201905141522
_bhanafiah
_c201803061454
_dsaini
_y201803061102
_zsaini
040 _aUMP
_beng
_cUMP
_erda
090 _aFKM .K435 2017 r Thesis
100 0 _aKhairul Muzafar Ahmad,
_eauthor.
245 1 0 _aModification of austenitic cast iron (Ni-resist) with high manganese content by using heat treatment /
_cKhairul Muzafar Ahmad
264 1 _aKuantan, Pahang :
_bUMP,
_c2017
264 4 _c© 2017
300 _axiv, 108 pages :
_billustrations (some color), charts ;
_c30 cm. +
_e1 CD-ROM
336 _atext
_2rdacontent
336 _atext
_2rdacontent
337 _aunmediated
_2rdamedia
337 _acomputer
_2rdamedia
338 _avolume
_2rdacarrier
338 _acomputer disc
_2rdacarrier
347 _atext file
_bPDF
_2rda
500 _aFaculty of Mechanical Engineering
502 _aThesis (Master of Science in Mechanical Engineering) -- Universiti Malaysia Pahang – 2017
504 _aIncludes bibliographical references
520 3 _aAustenitic cast iron broadly used in chemical and power plant, automotive and oil and gas industry. This material offers outstanding properties instability at a moderately high temperature and resistance to corrosion and wear which demanded by the industry. Austenitic microstructure in Ni-resist exists due to the influence of nickel as prime austenitic matrix promoter. However, using nickel as prime alloy addition for the production of Ni-resist Alloy is expensive due to its unstable prices. So, employing manganese as nickel replacement or mixing with for austenitic matrix promoter is an option that may reduce total processing cost. Therefore, the present study aims to explore the possibility to reduce nickel consumption by manganese substitution to generate the austenitic structure of Ni-resist. Furthermore, an investigation on the effect of the properties towards modified Ni-resist (Mn-Ni-resist) before and after heat treatment is appealing. Higher manganese austenitic cast iron with reduced nickel content (Mn-Ni-resist) was produced with manganese content nine wt%, ten wt%, 11 wt% and 12 wt% through Y-block according to ASTM A436 by using a green sand mold. Samples were then annealed at 700ºC, 800 ºC, 900 ºC, and 1000ºC for 3 hours before slowly cooled to room temperature in furnace temperature. The complex relationship between the development of the solidification microstructures and build up of micro-segregation due to increasing Mn wt% in Mn-Ni-resist was obtained by using cooling curve thermal analysis and complemented by microscopic observation and mechanical properties. Experimental describe the characterization of microsegregation in Mn-Ni-resist was made using point counting microanalysis along the microstructure. The result showed that manganese addition and heat treatment affect the microstructure and mechanical properties. Solidification cooling curve decreased, and the morphology of austenite dendrite arm shortened as the Mn wt% increased. Then, the strength reduced and more inferior compared to conventional cast iron. Microstructure observations revealed that Mn-Ni-resist consists of flake graphite embedded in the austenitic matrix and the accumulative of carbide at the frame of the rosette flake graphite and also known as late to freeze region (LTF). Higher annealing temperature on the Mn-Ni-resist has successfully reduced carbide formation and slightly increases tensile strength. The higher annealing temperature shows carbide altered into a smaller size and disperses through the austenitic matrix structure. The size of carbide decreased with increasing annealing temperature as observed in the microstructure. On the other hand, hardness diminished as the annealing temperature increases.
610 2 0 _aFaculty of Mechanical Engineering
_xDissertations
650 0 _aUniversities and colleges
_xDisertations
650 0 _aTheses
700 1 _eeditor , translator , contributor.
999 _aVIRTUA40
_c7714
_d7720
999 _aVTLSSORT0080*0200*0400*0900*1000*2450*2640*2641*3000*3360*3361*3370*3371*3380*3381*3470*5000*5020*5040*5200*6100*6500*6501*7000*9992