Analisis Hasil Ftir Epoxy Dgeba dengan Senyawa Amina

Epoxy is a thermoset material that is widely used as an adhesive. Epoxy has the advantages of good tensile strength, bending strength and thermal stability. Epoxy is an adhesive that can bind various materials such as steel, copper, wood, iron, cement, plastics and composites. Epoxy can be cured at room temperature with the addition of a hardener (curing agent). The curing agent affects the strength, hardness, durability and adhesion strength of the epoxy. Along with technological advances In shipping, other alternatives were found in the construction of wooden ships, namely the lamination system. Laminate wood usually uses epoxy resin material. Research on the strength of laminated materials for wooden boat hulls is an interesting scientific discussion to find new alternative materials that can be applied to wooden ship. With this lamination method it is very possible as a substitute for wood because with laimnation, the material besides having better strength is also easily available at a lower price than wood. Considering that this laminate material is rarely used on ships, it is necessary to test the adhesive material. This research was conducted to see the mechanical characteristics and evaluate the use of laminated materials. The tests carried out include FTIR tests, tensile tests and adhesive tests which are carried out in the laboratory to obtain results to analyze the strength and resistance of wooden ship

Pengelasan GTAW pada Stainless Steel Grade yang Berbeda untuk Aplikasi pada Power Plant

This research is conducted to annalyse mechanical properties and microstructure of GTAW for dissimilar stainless steel, 304 and 316L stainless steel. Stainless steel is commonly used on food industries, fertilize, and power plant. Widely stainless steel using due to lifetime and good corrosion resistance. This research is expected to contribute material selection reference and methode and suitable welding parameter for dissimilar welding on power plant's heat exchanger. The materials are 304 and 316L stainless steel which welded by 80, 100, and 120 A of current with 45° V-groove. And ER 309L and 316L filler metals. Then, hardness test and microstructure were conducted on HAZ of 340 stainless steel, weld metal, and HAZ of 316L stainless steel. According of the tests, the highest hardness was obtained on HAZ of 304 stainless steel with 80 A and 316L filler metal, but generally the high hardness was obtained by HAZ of 304 stainless steel with 80 A and 309L filler metal