Influence Of Laser Cladding on Behavior of Fatigue and Fatigue Corrosion

Abstract

Nickle based super alloys such as Inconel 600 are being extensively used to manufacture turbine blades for jet engines since their superior mechanical characteristics at higher working temps. The chemical composition of steam turbine blades show that is steel 52 it has a wide range of Energy, Tanks, Rail, Yellow Goods, Engineering, Bridges, Construction, applications. Laser cladding seems to be a surfacing method that uses lasers to improve the characteristics of a component’s surface and/or renew it. Laser cladding involves absorption of laser light that melts a small area of the substrates against which the substance was being introduced and fuses the coating substance to the substrates, resulting in the formation of a new layer. This research aims to investigate the fatigue and fatigue corrosion behavior of these turbine blades before and after exposure to laser cladding. The cladding process applied with this parameter Pulse energy = 11 joules, Pulse width = 6 Ms., Pulse frequency = 12 Hz, Laser Average Power = 132 W, Laser peak power = 1.83 KW. The results show, after cladding process the microstructure of the specimen is smooth and increase the cyclic of fatigue comparison with specimen without laser cladding process. So, the fatigue resistance is increased.

Improving Fatigue Corrosion Resistance of Turbine Blades Using Laser Processing

“…After the laser surface alloying process, an EDS device was employed to determine the surface chemical content. This equipment is often coupled to a scanning electron microscope (SEM) [19].…”

Study the Fatigue Corrosion Behavior of Turbine Blade by Laser Cladding

“…This process is known as laser cladding. Abdulwahab, et al [6] studied these turbine blades' corrosion and fatigue behavior before and after examining laser cladding. The method of cladding used with this variable Laser average power is 132 W, the maximum laser output is 1.83 KW, the pulse energy is 11 joules, the pulse width is 6 milliseconds, and the pulse frequency is 12 Hz.…”