What is weld decay? Weld decay is a form of intergranular corrosion, usually of stainless steels or certain nickel-base alloys, that occurs as the result of sensitization in the heat-affected zone during the welding operation.

2011年9月1日 · The best known weld-related corrosion problem in austenitic stainless steels is sensitization which is one of the major reasons for intergranular of austenitic stainless steels in weld HAZ, sometimes known as weld decay [1], [2], [3], [4].

2022年2月19日 · Weld decay is a corrosion cracking that mainly occurs as a result of sensitization in the heat affected Zones of metal during welding operations. This failure occurs in stainless steels or...

Intergranular corrosion is an especially severe problem in the welding of stainless steels, when it is often termed weld decay. Also a stainless steel, which has been heat-treated in a way that produces grain boundary precipitates and adjacent chromium depleted zones, it is sensitised.

2020年4月5日 · Intergranular corrosion of stainless steels that occurs due to sensitization in the heat affected zone (HAZ) (at appreciable distance from the weld) during welding is known as “weld decay”. Weld decay occurs in normal un-stabilized steels.

2024年7月19日 · Weld decay is a corrosion process that mainly occurs as a result of sensitization (regions susceptible to corrosion) in the heat affected Zones (HAZ) of metal during welding operations. This process mostly occurs in stainless steels or certain nickel-based alloys.

2019年1月11日 · Approaches for avoiding or minimizing this problem as a result of welding are addressed. An especially important class of high-alloy steels (which contain more than 10% alloy additions) are stainless steels that achieve resistance to corrosion by formation of a …

2024年12月14日 · What is Weld Decay? Weld decay refers to the corrosion and weakening of a welded joint or heat-affected zone (HAZ) due to the formation of chromium carbides along the grain boundaries. Chromium is the key element that provides stainless steel with its corrosion-resistant properties.

2012年11月28日 · Surface mechanical attrition treatment (SMAT) was applied to the samples of a type AISI 304 stainless steel in order to induce grain refinement as well as formation of twins. Transmission electron microscopy and X-ray diffraction analysis results showed that the average grain size at the surface of the SMATed sample was about 10 nm.

2024年4月18日 · Weld decay occurs due to chromium carbide precipitation at grain boundaries in the heat-affected zone (HAZ) during tungsten inert gas (TIG) welding of austenitic stainless steels. This issue is particularly significant concerning the welding of AISI 304 steels, commonly used in the food industry.