In the field of deep geothermal energy, mono-tube design will be increasingly used in future, as significant cost savings can expected production boreholes up to depths 6000 m. The previously bolting pipe lengths by means sleeves contributes significantly construction costs. addition, there is an increased risk failure for sleeve bolting, especially if different materials have layers purpose in...

Micro friction stir welding (μFSW) adalah pengelasan untuk ketebalan maksimal 1 mm. Tujuan penelitian mengetahui pengaruh feed rate dan sudut kemiringan pin tool pada μFSW aluminium 1100. Pengelasan dilakukan dengan variasi 0°,1° 2°, 66, 85, 120 mm/menit serta kecepatan putaran 2280 rpm. Jenis sambungan yang digunakan butt. Pengujian pengujian struktur mikro cacat makro mikroskop optik, uji kek...

Flash−butt welded rail is widely used in railway transportation; however, the joint vulnerable after a long time of service, and its damage mechanism controversial. Here, tensile reciprocating friction tests were carried out to analyze mechanical tribological behaviors between base metal U75VG rail. The results show that flash−butt welding promotes pearlite transform into ferrite, leading relat...

Abstract Remote Laser Welding (RLW) of Aluminium alloys has significant importance in lightweight manufacturing to decrease the weight body white. It is critical understand physical process transport phenomena during welding which highly related mechanical performance joints. To investigate underlying physics and influence beam oscillation on heat transfer, fluid flow material mixing a transien...

Abstract The paper discusses the topic of butt welding polyurethane drive belts by hot plate method in context modeling process this technological operation. Based on analysis process, a series studies thermomechanical properties material from which belt is made has been planned. results will be used for mathematical and particular its most important phase: plasticizing On basis, study compress...

Abstract The consideration of residual stresses in fatigue-loaded welds is currently done only qualitatively without reliable knowledge about their real distribution, amount and prefix. Therefore, the tools which enable a more or less unsafe design concepts are mainly based on experiences doubtful assumptions. Since use explicitly determined outside welding community state art, target presented...

Abstract The objective of the work is to present a new approach simulation thermal field in laser beam welding, based on an experimentally-fitted analytical model, applied investigate weldability AISI 304L austenitic steel. Reference made welding trial single pass two 10 mm thick butt-positioned plates. Welding was performed under keyhole full penetration mode, which characteristic high-power b...

• We investigate residual stresses and their relaxation in welded steel plates. Residual stress relaxations rely on redistribution plastic deformations . The its affect the ratio fatigue loads. does not vary range. This paper presents experimental numerical investigations to determine surface through-thickness welding butt-welded plates under actions. X-ray diffraction measurement validates acc...