Stress relaxation cracking failure in heat exchanger connection pipes in a petrochemical plant

Mallick, Ritesh Kumar; Ghosh, Manojit; Bahrami, Abbas; Esmaeili, Vahid

doi:10.1016/j.engfailanal.2023.107156

Cited by 4 publications

(1 citation statement)

References 22 publications

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“…Pipes are one of the most heavily stressed major components of HXs used in harsh working environments, such as power plant sectors, resulting in frequent premature failures. Studies have been carried out to investigate heat exchanger pipe failure due to corrosion and wear attack aggravated by elevated temperatures, reducing gases, high pressures, and cyclic stresses [3][4][5]. Degradation of HX pipes can be mitigated by careful material selection and applying resilient coatings to tube surfaces because some metals are better suited to endure attack in a particular environment than others [6].…”

Section: Introductionmentioning

confidence: 99%

The potential use of laser cladded functionally graded materials to mitigate degradation in boiler tube heat exchangers for power plant applications: A review

Morake,

Mutua,

Ruthandi

et al. 2023

Surface Engineering

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Surface modification is essential to safeguard heat exchangers from premature failure spurred by deterioration mechanisms such as corrosion and wear, which diminish performance. Meanwhile, modifying some substrates with dissimilar materials is challenging due to a mismatch in material properties. Moreover, individual alloy coatings on substrates are usually insufficient in the required material properties, leading to accelerated failure of equipment, especially in power plant industries. This article summarised the knowledge base on functionally graded materials (FGMs) while emphasising how this promising class of novel materials can reduce deterioration. Additionally, laser cladding is established to be a suitable technique for processing FGMs. A particular focus is laid on the laser beam interaction with the FGM and expounding on the processing and material parameters that affect the microstructural properties of FGMs. The development prospects for processing FGMs with superior clad quality characteristics to increase boiler pipes' service life and performance are also highlighted.

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