Failure study of steam turbine Last-Stage rotor blades under a High-Speed wet steam environment

Gao, Jiashun; Xu, Zhilong; Tang, Zhuolin; Lei, Yu; Sun, Wenbing; Guo, Bicheng; Zhao, Zhenye

doi:10.1016/j.engfailanal.2023.107643

Cited by 2 publications

(1 citation statement)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fatigue striations are found in the region close to one of the steps, see Figure 11C. The visualization of fatigue striations on the reed confirms the propagation of fatigue cracks, where the crack propagates mainly intergranularly but may present a small portion of transgranular propagation [19]. Large plastic deformations with material entrainment were observed on the fracture surface, see Figure 12A.…”

Section: Resultsmentioning

confidence: 67%

Failure Analysis of a Martensitic Stainless Steel Steam Turbine Blade

Ruchert,

Carvalho

2023

Preprint

View full text Add to dashboard Cite

This work investigated the possible causes of premature failure of a steam turbine blade made from X20CrMo13 stainless steel. During their operation in power generation plants, the blades may suffer service failures that occur naturally or accelerated due to metallurgical or mechanical causes. In this work, one investigated the possible causes of the failure of a martensitic stainless steel turbine blade operating in a 25 MW turbine in a quenched and tempered cogeneration plant that fractured during operation. The results showed a martensitic structure with a delta ferrite content above 5%. Beach marks and fatigue striations were observed, arising from fatigue crack propagation. The tensile test showed an area reduction of 15%, probably due to carbide precipitation. Keywords: Turbine blade; Stainless steel; Fatigue; Failure Analysis.

show abstract

Section: Resultsmentioning

confidence: 67%