Apr 01, 1985 · Nuclear Engineering and Design 86 (1985) 69-77 69 North-Holland, Amsterdam AGING DEGRADATION OF CAST STAINLESS STEEL:STATUS AND PROGRAM * O.K. CHOPRA and G. AYRAULT Materials Science and Technology Division, Argonne National Laborato(~', 9700 South Cass Avenue, Argonne, 1L 60439, USA Received 8 June 1984 A program has been initiated to investigate the significance of in-service embrittlement
Charpy impact behaviour of austenitic stainless steel welded joints. The objective of the project was to measure the fracture toughness of tow welded joints performed with G.T.A.W process using 316L as a base metal and either ER316LN and ER308LN as filler metal, and to discuss the causes leading to the difference found between their toughness Effect of Sigma Phase on Fracture Behavior of Steels and May 29, 2017 · Welding wires Ø 0.8 mm were used for welding. A matching filler metal Thermanit 304HCu was used for homogeneous weld joints of Super 304H steel, whereas overmatching nickel-based alloy filler metals Thermanit 617 and UTP A6170Co were used for homogeneous weld joint of HR3C steel.
May 29, 2017 · Welding wires Ø 0.8 mm were used for welding. A matching filler metal Thermanit 304HCu was used for homogeneous weld joints of Super 304H steel, whereas overmatching nickel-based alloy filler metals Thermanit 617 and UTP A6170Co were used for homogeneous weld joint of HR3C steel. Embrittlement of austenitic stainless steel welds The aging behavior of type-308 stainless steel weld has been examined over a range of temperatures 475--850 C for times up to 10,000 hrs. Upon aging, and depending on the temperature range, the unstable ferrite may undergo a variety of solid state transformations. These phase changes creep-rupture and Charpy impact properties.
Apr 18, 2020 · This study investigated the hydrogen embrittlement (HE) susceptibility of base material and gas metal arc welds from a highstrength lowalloy steel grade S690QL by slow strain rate test (SSRT) with insitu hydrogen charging. Hydrogen Embrittlement Susceptibility of Gas Metal Arc Apr 18, 2020 · Welded joints of S690QL steel plates were produced using GMAW. The base material has a plate thickness of 15 mm, the workpiece geometry in the welded joint is 400 mm × 300 mm (length × width), whereby the welding direction follows the rolling direction. A Vbutt joint with a weld preparation angle of 60° was chosen.
Higher strength steel increases rigidity and therefore stresses. Allow the Hydrogen to diffuse out of the steel. Keep it warm, again preheating will increase the time for diffusion. Allow it to cool slowly after welding, pack it in sand. Use low hydrogen consumables. Use austenitic steel consumables (Stainless E309, E312, E308Mo, E307). Hydrogen embrittlement and fracture mechanism of friction Jan 20, 2021 · Many researchers pay attention to the hydrogen embrittlement mechanism of welded joints of high strength steel. Li et al. studied the effect of pre-strain on hydrogen embrittlement of 304 L Austenitic Stainless Steel K-TIG welded joint. With the increase of pre-strain, the enrichment of hydrogen atoms leads to the segregation of dislocations
This paper presents investigation results on effect of thermal aging embrittlement on residual stresses of austenitic stainless steel repair welds in nuclear components subject to seismic loads. First, the welds on austenitic stainless steel 316L plates were manufactured consisting of the austenitic stainless steel weld metal with the ferrite content sensitive to the thermal aging Liquid metal embrittlement and common embrittling The general rules for the possible occurrence of liquid metal embrittlement are:Low mutual solubility between the liquid and solid metals. Absence of intermetallic compound formation between the solid-liquid couple. Some significant examples of embrittling couples include:steel-Cu, stainless steel - Zn, aluminium-Hg.
Jan 01, 2018 · In the case of low temperature aging (<550Â°C) of weld, the five metallurgical process namely, spinodal decomposition, precipitation of alpha prime, secondary austenite, G-phase and metal carbides are identified as responsible to aging embrittlement of the ferrite phase. 2. Material Selection 2.1. Main Problems Encountered in Welding of 18cr Austenitic Dec 11, 2020 · However, under different working conditions, austenitic stainless steel welding joints often face some special problems, which are easy to cause construction defects such as intergranular corrosion, stress corrosion, knife corrosion, welding hot cracks, phase embrittlement and so on. Corrosion analysis of welded joints
With Rajuri 500 Bars, the weld joints stay strong because the steel has a carbon content less than 0.25%, making it suitable for butt and other weld joints. Manual arc welding also is easier as pre-heating and post heating are not required. Remedies for hydrogen-embrittlement on Grade-91 steel This paper discusses the effect of different combinations of preheating and post-heating on the corrosion and hydrogen embrittlement of Grade-91 steel weld joint in the as-welded condition. Though these welds are subjected to post-weld heat treatment (PWHT), there could be long delay in executing this, especially in the case of fabrication of large components, and during this
Cross bar welding can lead to local embrittlement of reinforcing steel. When welding on bars that are already embedded in concrete, allowances must be made for thermal expansion of the steel to prevent spalling or cracking of concrete or destruction of the bond between the concrete and steel. The effects of postweld heat treatment and isothermal Apr 12, 2016 · Ageing Effects on Room-Temperature Tensile Properties and Fracture Behavior of Quenched and Tempered T92/TP316H Dissimilar Welded Joints with Ni-Based Weld Metal. Metals, Vol. 8, Issue. 10, p. 791. Metals, Vol. 8, Issue. 10, p. 791.
Ageing Embrittlement of 15Cr1Mo1V Steel Welded Joints Evaluated by Small Punch Test Authors:Yu Hong Yao, Jian Feng Wei, Jiang Nan Liu, Zheng Pin Wang, Yao Hua Jin Abstract:The microstructure and property of 15Cr1Mo1V steel welded joints after 70,000h service have been researched by OM, SEM, Vickers hardness test and small punch test (SPT).