Products tagged with 'alloy 52'

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Effect Of Microstructure On Mechanical Behaviour Of Ni-Base Alloy Dissimilar Metal Welds

Product Number: ED22-17104-SG

Author: Noora Hytönen, Yanling Ge, Zaiqing Que, Sebastian Lindqvist, Jari Lydman, Ulla Ehrnstén, Paavo Rautala,Iikka Virkkunen, Pål Efsing

Publication Date: 2022

$20.00

Dissimilar metal welds (DMWs) are commonly used in the pressure vessel nozzle to safe-end weld between the ferritic low-alloy steels (LAS) and the austenitic stainless steels (SS), using a nickel-base filler metal. The complex DMW interface consists of different microstructural regions including, for instance, the heat-affected zone (HAZ), carbon-depleted zone (CDZ), carbon build-up at fusion boundary, partially melted zone (PMZ) and carbide precipitation zone. There is still knowledge lacking on the microstructural characteristics of the interface of DMWs upon post-weld heat treatment (PWHT). DMWs are potential concerns regarding the structural integrity of the nuclear power systems. In particular, the LAS/nickel-base alloy weld metal interface is known to develop a local strength mismatch upon PWHT and during long-term ageing. A significant chemical composition gradient, especially in terms of carbon (C) and chromium (Cr) associated with a complex microstructure have been observed to form at the interfaces. The different welding orientation, heat transfer and PWHT can result in different microstructure and mechanical properties.

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SCC of Alloy 152/52 Welds Defects, Repairs, Dilution Zones and HAZs in PWR Water

Product Number: ED22-17243-SG

Author: Peter L. Andresen, Chris Wax

Publication Date: 2022

$20.00

Stress corrosion cracking (SCC) has been observed for over six decades in light water reactors structural components, with wide variations in the rate of SCC initiation and crack growth. Newer materials have been adopted in the last three decades, primarily the ~30% Cr Alloy 690 (UNS N06690) and its weld metals, Alloy 52 (UNS W86052) and Alloy 152 (UNS W86152). These materials were initially viewed as immune to SCC, but are now recognized to be susceptibility to SCC, and can exhibit high growth rates in some conditions.

Products tagged with 'alloy 52'

Effect Of Microstructure On Mechanical Behaviour Of Ni-Base Alloy Dissimilar Metal Welds

SCC of Alloy 152/52 Welds Defects, Repairs, Dilution Zones and HAZs in PWR Water

Association for Materials Protection and Performance