Failure of 304 stainless bellows expansion joint

Guan, Kaishu; Zhang, Xinghua; Gu, Xuedong; Cai, Longzhan; Xu, Hong; Wang, Zhiwen

doi:10.1016/j.engfailanal.2004.05.007

Cited by 23 publications

(6 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A relevant experimental result, described by [40], is the appearance of the strain-induced martensite, transformed from austenite during the cold working process that can be observed in Figure 4. Which could be related with the appearance of corrosion points, since the formation of micro-pitting occurs preferentially in areas where the tensile residual stresses are the highest [41].…”

Section: Analysis Of Results and Discussionmentioning

confidence: 99%

Pitting Corrosion in AISI 304 Rolled Stainless Steel Welding at Different Deformation Levels

et al. 2019

View full text Add to dashboard Cite

This paper analyzes pitting corrosion at the weld zone and at the heat affected zone (HAZ) in AISI 304 rolled stainless steel welds. As the aforementioned material is one of the most frequently used types of stainless steel, it is needful to be aware of the mechanisms that lead to its deterioration, like corrosion, since it can cause failures or malfunction in a wide variety of products and facilities. For the experimental tests 1.5 mm thick AISI 304 stainless steel plates were welded and rolled to different thicknesses and after, the samples were subjected to mechanical and corrosion tests and to a micrograph study. Deformation stresses and other intrinsic metallurgic and physic-chemical transformations that occur during cold rolling and welding, and that are key factors in the anti-corrosion behavior of AISI 304 rolled stainless steel, have been observed and analyzed. A correlation has been found between cold work levels in test samples and number of pits after corrosion tests.

show abstract

Section: Analysis Of Results and Discussionmentioning

confidence: 99%

Pitting Corrosion in AISI 304 Rolled Stainless Steel Welding at Different Deformation Levels

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Any alloy susceptible to corrosion is also vulnerable to corrosion fatigue. Martensitic stainless steels are known to be susceptible to failure in the presence of S and Cl contamination . Cracking can initiate on the blade surface at pits or other surface defects and irregularities of very small surface size and rapidly propagate through a martensite microstructure .…”

Section: Resultsmentioning

confidence: 99%

Failure analysis of an impeller blade

Ul‐Hamid

Al‐Hadhrami

Mohammed

et al. 2013

Materials & Corrosion

View full text Add to dashboard Cite

A multi-stage low-pressure centrifugal air compressor used in the utility section of a manufacturing plant tripped. An increase in vibration was recorded prior to the breakdown. Subsequent inspection revealed that a small part of one blade had fractured and separated from the impeller body. The failure occurred in the 3rd stage impeller blade employed in a three-stage compressor with two interstage cooling tanks. The air compressor had been in service for 18 years while the current impeller had been used for 18 months. Impeller was made of 17-4 PH steel. Scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction, and Vickers hardness testing were used to metallurgically evaluate the broken blade and corrosion deposit obtained from cooling tank. Experimental results indicated that the mode of failure of the impeller blade was corrosion fatigue. Hardness of impeller material was also found to exceed the upper limit required to use it in sulfur bearing environment. Cause of failure can be attributed to intense vibrations in the compressor system responsible for the generation of stresses that led to the fatigue failure of impeller blade already embrittled due to improper heat treatment and exposed to an environment made corrosive due to the presence of sulfur.

show abstract

“…Metal bellows has been in a state of repeated bending for a long time to compensate for the displacement of the pipeline because oxygen needs to be continuously blown in the steelmaking furnace. 4,5 Especially under large deformation, the bending deformation of the waveforms at the fixed end of the metal bellows exceeds the limit bending state, and crushing occurs, resulting in pipeline failure.…”

Section: Introductionmentioning

confidence: 99%

Ultimate bending performance and fatigue life of U-shaped metal bellows

Hao

Chen

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

Metal bellows used in the flexible connection of metallurgical converter oxygen lance compensates for pipeline displacement through its bending deformation, and adjacent waveforms in the concentrated deformation area are squeezed, resulting in premature fracture. The bending geometric model of U-shaped metal bellows is established in this paper, and the geometric relationship between waveform structure parameters and ultimate bending radius is derived. Moreover, a mathematical model of bending moment (M) with bending angular displacement (θ) about wave height H and wave crest fillet radius Rc is established. Then, combined with Fe-safe fatigue life analysis software, the fatigue life and failure location of metal bellows are obtained. The optimal waveform parameter design range of DN80 metal bellows with high repeated bending fatigue life under large bending is determined. Finally, the bending performance and fatigue life of bellows are tested on a bending fatigue testing machine. The distribution law of fatigue life and the propagation law of cracks at the wave trough of metal bellows under different bending angular displacement amplitudes are obtained. The crack propagation mechanism and fracture mechanism under different displacement amplitudes are revealed by a scanning electron microscope. In the engineering application of large bending, the pipeline failure caused by the ultimate bending deformation of metal bellows can be avoided according to the prediction results of fatigue life.

show abstract

Failure of 304 stainless bellows expansion joint

Cited by 23 publications

References 15 publications

Pitting Corrosion in AISI 304 Rolled Stainless Steel Welding at Different Deformation Levels

Pitting Corrosion in AISI 304 Rolled Stainless Steel Welding at Different Deformation Levels

Failure analysis of an impeller blade

Ultimate bending performance and fatigue life of U-shaped metal bellows

Contact Info

Product

Resources

About