The hot wire plasma arc welding process, a hybrid process between the plasma arc welding (PAW) process and hot wire process, is used to weld 316 stainless steel sheets, in which the temperature generated during welding is recorded in real time with a high-speed infrared thermography camera. Therefore, this research studies the factors in the hot wire process, of which there are two: (1) wire feed rate and (2) wire current; this study investigated the tensile strength, microhardness, and relationship of cooling rate per tensile strength and microhardness. The study found that the hot wire current plays an important role in cooling rates and tensile strength. The temperature results from high-speed infrared thermography camera show that the maximum welding temperature is around 1300 °C. The weld pool has a temperature between 900 and 1300 °C and the temperature profile of the weld pool will look like an “M” shaped, which is caused by the hot wire process. Finally, the appropriate hot wire parameters are 1.5 m/min for wire feed rate and 40A for wire current, which will give the workpiece cooling rate of 800–500 °C as 13.42 °C/s, tensile strength of 610.95 MPa, and the average Vickers microhardness of 195 HV.

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This paper focuses on implementing supervisory level control of robot plasma spraying on internal surface of a free-form tubular shape found in gas turbine engine parts. Plasma spray process is used for applying Thermal Barrier Coating (TBC) onto a surface of gas turbine parts to provide layer of anti-corrosion and heat resistance made out of ceramic material built up during plasma spray deposition. At the core of the supervisory control lie three important components. First is the planning level. Second is the Task Level and third is the Process level implementation.In the scope of this paper, we will describe this supervisory level control structure and provide focus on the Torch Speed Modification in Task Level Implementation.

The hot-wire laser welding is additive manufacturing (AM) technique, complex parts can be created directly by melting layers of wire. This process is characterized by the use of hot-wire process, a combination with the laser welding (LW) process in the AM process. In this research, the experimental investigation of additive manufacturing using a hot-wire laser welding on titanium alloy (grade 2) parts. The parameters in the hot-wire laser process of which there are three: (1) the welding speed, (2) wire current, and (3) wire feeding speed; this research examined the porosities, microhardness, tensile stress, and residual stress. The filler metal used titanium AMS (American welding society) 4951F (grade 2) welding wire and has a diameter of 1.6 mm. Finally, the appropriate hot wire laser welding parameters are 0.183 cm/s for welding speed, 40 A for wire current, and 1.00 m/min for wire feeding speed, which will give the average Vicker microhardness of 321.00-345.80 HV, the average tensile strength of 432.02 MPa (substrate); 670.30 MPa (horizontal direction), 497.39 MPa (Vertical direction).

This paper investigates the possibility of creating an insert mold using an epoxy resin composite (alurninum, resin and hardener), The properties of epoxy resin composite and rapid tooling techniques are studied and