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008 090713t2008 my a f m 001 0 eng|d
020 _aTHE0007408(Local)
039 9 _a201905151159
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_c201107132152
_dVLOAD
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040 _aUMP
090 _aTN672 .H34 2008 rs Bc.
100 0 _aMohamad Hafizul Hisyam Yahya
245 1 0 _aCharacterization and modeling of static recovery process of brass (Copper Zinc) alloy /
_cMohamad Hafizul Hisyam Bin Yahya
246 3 _aCharacterization and modeling of static recovery process of brass (Copper Zinc) alloy
_h[electronic resource]
260 _aKuantan, Pahang :
_bUMP,
_c2008
300 _a58 p. :
_bill. (some col.) ;
_c30 cm. +
_e1 computer disc
502 _aProject paper (Bachelor of Mechanical Engineering) -- Universiti Malaysia Pahang - 2008
520 3 _aStatic recovery process is a process of restoration of material properties back to original state. This process only occurs just below recrystallization temperature. In static recovery condition the dislocation of material is annihilated so the internal stress of material could be released. To obtain fraction of recovery, brass will be pre strain in various amount of value before go through annealing process in various static recovery temperature. This experimental process starts with machining the specimens by using manual lathe machining. Then all the specimens will be annealed in recrystallization temperature which is 570˚C. Next process is pre strain in various pre strain performed by compression and tensile test machine. After that process, specimens will be annealed in recovery temperature which is below 290˚C. Then final pre strain will be performed to obtain yield strength of recovered material. Finally based on the experimental data Friedel’s model is used to acquire activation energy. From the calculation some of the activation energy value could be acquire such as -30 kJ/mol, 516 kJ/mol, 276 kJ/mol and 349 kJ/mol. These values of activation energy are compared with value obtained by using same method that used by Martinez which is in range of 216-357 kJ/mol. From the comparison percent of difference can be acquire. Since this percent of difference could be acquired, the significant value can be obtained and this is how Friedel’s model is validated.
650 0 _aMetals
_xHeat treatment
999 _aVIRTUA40
_c1200
_d1206
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