000			02139ntm a2200253 a 4500
001			vtls000083856
003			KUKTEM
005			20251117113238.0
008			141120t2013 my a f m 000 0 eng d
020			_aTHE0006474(Local)
039		9	_a201905141203 _bamirul _c201411210925 _dariffin _c201411201325 _dariffin _y201411201253 _zariffin
040			_aUMP
090			_aTJ1060 .N67 2013 r Bc.
100	0		_aMohd Norfaez Ismail
245	1	0	_aLaser surface modification of gray cast iron using ND: YAG laser for enhanced surface properties / _cMohd Norfaez Ismail
260			_aKuantan, Pahang : _bUMP, _c2013
300			_axv, 56 p. : _bill. (some col.) ; _c30 cm.
502			_aProject paper (Bachelor of Mechanical Engineering (Automotive)) -- Universiti Malaysia Pahang – 2013
504			_aBibliography : p. 55-56
520	3		_aThis report presents laser surface modification on gray cast iron using Nd: YAG laser for enhanced surface modification. Material used in this work was gray cast iron from automotive brake disc. Experiments were performed using was Nd: YAG pulsed laser under different processing conditions. The parameters of interest were the laser peak power of 670 W, 800 W, 1000 W, Pulse repetition frequency of 50 Hz, 60 Hz, 70 Hz and travel speed 1000 mm/min, 1200 mm/min, 1400 mm/min. Various modification layers of gray cast iron were analyzed with respect to microstructure, hardness value, hardening depth, and surface roughness. Results of laser incidence under different processing conditions are presented. Different microstructure achieved by applying range of laser treatment selected parameter. A good increase of micro hardness in the entire performed test was verified at Peak power of 830 W, speed and pulse repetition frequency of 1400 mm / min and 50 Hz respectively. A minimum depth at 134.262 μm and maximum hardness at 423.014 HV0.3 was produced. These findings were important to increase wear resistant of brake disc surface.
650		0	_aFriction materials
650		0	_aBrakes
999			_aVIRTUA40 _c5359 _d5365
999			_aVTLSSORT0080*0200*0400*0900*1000*2450*2600*3000*5020*5040*5200*6500*6501*9992