Corrosion effects on structural integrity and life of oil rig welded pipes are analysed by experimental, analytical, numerical methods. Experiments were performed using standard tensile specimens CT for static loading, Charpy impact 3 Point Bending fatigue crack growth with amplitude loading. In each case new old used to evaluate corrosion effects. Results indicated negligible in the properties...

Residual stresses created from welding have a direct influence on fracture mechanisms of cracks and flaws in around welded regions. Excessive residual stress can lead to unexpected failures an important property fitness-for-service calculations. In this work, experimental database the low heat input austenitic girth welds is analysed for statistical correlation. The combined measurement profile...

The load-carrying capacities of welded joints need to be paid attention in the design frame, which transfers thrust generated by rocket engine body. A capacity evaluation method based on structural stress is proposed this study. Both ultimate and fracture section angle are precisely obtained method. At same time, a definition weld-failure given tests. frame analyzed through finite element model...

Shrink-fitting, a common bonding technique in metal assemblies, was used for mortise and tenon wood joints. The joints had considerable strength. Shrink-fitting yielded joint strengths comparable to those obtained by using several welded dowels. Increasing the number of welded dowels, however, produced joints of higher strength than those bonded just by shrink-fitting. Combining in the same joi...

The friction welding of Zr55Al10Ni5Cu30 bulk metallic glasses (BMG) has been tried. An apparatus for the friction welding of BMGs adopting a pneumatic cylinder and gripper based on a conventional lathe, and a welding process which provides a sufficient cooling rate after welding were devised. Friction time and friction pressure were chosen as the control parameters in the friction welding proce...

The reliability of welded structure can be evaluated through welding residual stress analysis and fatigue strength assessment. In this study, welding residual stresses of multi-pass dissimilar material welded joint between alloy 617 and 12Cr steel were analyzed numerically and experimentally. Fatigue strength was then assessed in the air. Based on results of welding residual stress analysis and...

There are many industries where austenitic stainless steel needs to be welded specially in power generation industries. Unfortunately the austenitic stainless welding has several fabrication and metallurgical drawbacks when welded by using conventional fusion welding methods, which can often leads to in-service failure. The most pronounced fabrication faults are hot cracks due to inadvertent us...

The aim of this study is to evaluate the microstructures, tensile lap shear strength, and fatigue resistance of 6022-T43 aluminum alloy joints welded via a solid-state welding technique-ultrasonic spot welding (USW)-at different energy levels. An ultra-fine necklace-like equiaxed grain structure is observed along the weld line due to the occurrence of dynamic crystallization, with smaller grain...