Recently added articles from Welding International:

Numerical simulations of weld hardness distributions in ultra-narrow gap GMA welding. Evaluation of weld hardness distributions by numerical simulations of welding thermal cycles and microstructural phase fractions (1st report)

Sep 01, 2006; Mikami, Y; Mochizuki, M; Toyoda, M; Nakamura, T; Hiraoka, K ... Introduction Welded joints used in some circumstances may generally face the problem of loss of joint performance due to welding heat input as well as welding deformation and welding residual stress. For example, ultra-fine grained steel welds may sustain softening in regions heated in a ...

Evaluation of microstructural phase fractions and hardness distributions of weld metal subjected to multiple thermal cycles. Evaluation of weld hardness distributions by numerical simulations of welding thermal cycles and microstructural phase fractions (2nd report)

Sep 01, 2006; Mikami, Y; Mochizuki, M; Toyoda, M; Hashiba, Y; Et al ... Introduction Multipass welding used extensively for fabrication of welded structures is seeing efforts being made to tackle important problems such as the upper limit of the welding heat input and interpass temperature in order to maintain the mechanical properties of welds.1-3 Because ...

Heat input and deformation control in resistance micro-welding of fine nickel wires*

Sep 01, 2006; Fukumoto, S; Tsubakino, H; Zhou, Y ... Introduction Micro or small-scale resistance welding has been used since the 1960s for production of small electronic and medical devices. Amid accelerating downsizing of structures seen in recent years, however, scale-down and reliability improvement have been progressively sought in ...

Biofilm adhesion and microbially influenced corrosion of SUS304 welds exposed to dam water

Sep 01, 2006; Anzai, T; Nakano, K; Nishio, K; Matsukawa, K ... Introduction The authors have previously investigated and analyzed cases of microbially influenced corrosion (referred to below as MIC) in stainless steels exposed to mild fresh water environments such as groundwater, dam water, river water and industrial water.1, 2 Laboratory-based MIC ...

A simplified solution for the evaluation of residual weld stress

Sep 01, 2006; Rogante, M; Cesari, F G; Ferrari, G; Battisella, P ... (ProQuest Information and Learning: ... denotes formulae omitted.) Introduction Predicting complex phenomena, such as residual stress distribution in weldments, can be profitably performed through the use of simplified analytical methods capable of representing the main process ...

Arc initiation phenomena by space GHTA welding process using touch start technique in a vacuum

Sep 01, 2006; Suita, Y; Matsushita, K; Terajima, N; Tsukuda, Y; Masubuchi, K ... Introduction There is a pressing need to establish the technique to repair shuttle craft in space as illustrated by the accident that caused the aerial disintegration of 'Columbia' on 1 February 2003, and the accident relating to the heatresisting system, which occurred at the time of ...

Selection of empirical equations for approximating the distribution of arc pressure

Sep 01, 2006; Kopaev, B V; Rybachuk, A M; Lebedev, V A ... (ProQuest Information and Learning: ... denotes formulae omitted.) The quality of the welded joint in arc welding is controlled by the formation of the welded joint, which depends mainly on the conditions of formation and solidification of the weld pool. The latter is subjected to the ...

Harmonic components of the current and voltage in welding of butt joints with edge preparation

Sep 01, 2006; Panarin, V M; Vorontsova, N V; Roshchupkin, E V ... (ProQuest Information and Learning: ... denotes formulae omitted.) In arc welding with the weaving of the electrode, the characteristic feature is the modulation of welding current and the composition of current contains harmonic components with different frequency, multiplied by the ...

The effect of surface oxides on the properties of welded joints in different methods of surface preparation and parameters of pressure welding

Sep 01, 2006; Markashova, L I; Grigorenko, G M; Arsenyuk, V V; Chubenko, A N ... In the examination of different conditions of pressure welding, which determine the quality of welded joints (welding deformation and welding temperature, the duration and rate of welding deformation, etc), a special role is played by the condition of the contacting surfaces.1 In this case, it ...

Technological properties of activated electrodes for manual arc welding

Sep 01, 2006; Parshin, S G; Kazakov, Yu V; Zakharenko, A P ... The increase of the productivity of the process of manual arc welding and of the quality of welded joints is an important task of welding production. In particular, the task can be solved using activating fluxes. The effect of the fluxes is manifested in the simultaneous effect on the arc and on ...

Regulating welding deflection and reinforcement of compressed bars of steel trusses

Sep 01, 2006; Rodionov, I K ... As shown by the analysis of failures taking place during the service of welded frames and buildings, almost 50% (approximately 44%) take place as a result of the loss of stability of the individual bars or sections of the structure. 1, 2 It is therefore evident that it is essential to reinforce ...

Brazing of components with the surfaces in the vertical position

Sep 01, 2006; Kufaikin, A Ya; Shibalov, M V ... (ProQuest Information and Learning: ... denotes formulae omitted.) The process of brazing certain components should be carried out with the surfaces in the vertical position, in particular, components consisting of coaxial shells connected together (Fig. 1). These components are brazed ...

Using activating fluxes in resistance flash butt welding

Sep 01, 2006; Parshin, S G ... Pipelines for steam and hot water are produced by resistance flash butt welding. The internal and external flashes are removed with a flash removing device with blowing compressed air through the pipes. At the moment of blowing, the root part of the welded joint and the flash are in the ...

Local heat treatment of welded joints in casing structures of atomic power stations

Sep 01, 2006; Korol'kov, P M ... The local heat treatment of welded joints in pipelines with casing structures of atomic power stations (reactor, steam generator, heat exchanger, etc) is associated with considerable technological difficulties. The small length of the nozzles of these systems to which the pipeline is welded ...