Investigation of turbine blade failure in a thermal power plant

Ziegler, Donald; Puccinelli, M.; Bergallo, B.; Picasso, A.

doi:10.1016/j.csefa.2013.07.002

Cited by 46 publications

(25 citation statements)

References 4 publications

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“…Pada penelitian sebelumnya bahwa analisis kegagalan pada sudut tekanan rendah dari turbin uap [4]. Mekanisme kegagalannya dipicu oleh adanya retak mikro dan unsur klorida didalam retakan tersebut sehingga akhirnya sudu tersebut mengalami patah.…”

Section: Pendahuluanunclassified

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KETAHANANIMPAK,KEKERASAN DAN STRUKTUR MIKRO PADA BAJA TAHAN KARAT MARTENSITIK13 Cr3MO3Ni DENGAN VARIASI SUHU PERLAKUAN PANAS

Praguna

Anwar²,

Sunardi

et al. 2018

JUSAMI

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Sudu turbinmerupakan salah satu bagian penting pada turbin yang bertujuan untukmemutar poros turbin sehingga menghasilkan energi listrik. Pada umumnya material yang digunakan pada sudu turbin adalah baja tahan karat martensitik, akan tetapimaterial tersebut mudah terjadi kegagalan.Mekanisme kegagalannya dipicu oleh adanya retakmikro dan unsur klorida didalam retakan tersebut sehingga akhirnya sudut tersebut mengalami patah. Adanya perbedaan perlakuan panas juga mempengaruhi nilai kekerasan yang berdampak pada jenis patahan yang dihasilkan pada baja tersebut. Pada penelitian ini bertujuan untuk mengevaluasi ketahanan impak, kekerasan dan strukturmikro pada baja tahan karatmartensitik 13 Cr3Mo3Ni dengan variasi suhu perlakuan panas serta mengevaluasi bentuk patahan pada baja tahan karat martensitik 13 Cr3Mo3Ni. Proses austenisasi dilakukan pada suhu 1000 oC, 1050 oC, dan 1100 oC dengan proses tempering pada suhu 500 oC, 550 oC, 600 oC, 650 oC, dan 700 oC dengan waktu penahanan 60 menit. Sedangkan uji mekanik yang dilakukan adalah uji kekerasan rockwell C dan uji impak charpy. Dan untukmengetahui strukturmikro yang terbentuk,maka dilakukan uji metalografi dan untuk mengetahui hasil patahan setelah dilakukannya uji impak,maka dilakukan uji SEM.Adapun hasil yang diperoleh dari penelitian ini yaitu nilai kekerasan terendah ditunjukkan pada suhu austenisasi 1000 oC dan suhu tempering 700 oC, yaitu 38,13 HRC. Sedangkan nilai impak tertinggi ditunjukkan pada suhu austenisasi 1100 oC dan suhu tempering 650 oC, yaitu 114,00 J. Adapun strukturmikro yang terbentuk adalah martensit, austenit sisa, ferit, dan karbida logam.

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Section: Pendahuluanunclassified

“…Bentuk patahannya memperlihatkan adanya deformasi plastis atau dimples. Adanya perbedaan perlakuan panas juga mempengaruhi nilai kekerasan yang berdampak pada timbulnya retak mikro pada baja tersebut [4].…”

Section: Pendahuluanunclassified

KETAHANANIMPAK,KEKERASAN DAN STRUKTUR MIKRO PADA BAJA TAHAN KARAT MARTENSITIK13 Cr3MO3Ni DENGAN VARIASI SUHU PERLAKUAN PANAS

Praguna

Anwar²,

Sunardi

et al. 2018

JUSAMI

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“…Among different candidate materials for harsh high-temperature working conditions in turbines, nickel-and cobalt-based superalloys have long been known as the best options on the grounds that these alloys are capable of working at high temperature, while they keep their properties [16]. These alloys benefit from a unique and exceptional combination of high-temperature mechanical properties (i.e., superior creep resistance), excellent resistance to high-temperature degradation/oxidation, and superior microstructural stability during high-temperature service [17].…”

Section: Introductionmentioning

confidence: 99%

Corrosion-Fatigue Failure of Gas-Turbine Blades in an Oil and Gas Production Plant

et al. 2020

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This paper investigates the root cause of a failure in gas-turbine blades, made of Nimonic-105 nickel-based superalloy. The failure was reported in two blades in the second stage of a turbine-compressor of a gas turbine in the hot section. Two failed blades were broken from the root and from the airfoil. The failure took place after 20 k h of service exposure in the temperature range 700–850 °C, with the rotating speed being in the range 15,000–16,000 rpm. The microstructures of the failed blades were studied using optical/electron microscopes. Energy dispersive X-ray spectroscopy (EDS) was employed for phase identification. Results showed that failure first initiated from the root. The dominant failure mechanism in the root was concluded to be corrosion-fatigue. The failure scenario was suggested based on the results obtained.

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“…The conditions which these blades operate make them most susceptible to failure and demand periodic inspection. Turbo-machinery blade failures are mainly caused by high cycle fatigue which arises as a result of mechanical vibration resulting from high alternating stresses [4,5,6]. According to Kalapala [7], about 42% of the total gas turbine failures are caused by vibration induced fatigue.…”

Section: Introductionmentioning

confidence: 99%

Modal Analysis of Conventional Gas Turbine Blade Materials (Udimet 500 and IN738) For Industrial Applications

Efe-Ononeme¹,

Ikpe

Ariavie³

2018

Journal of Engineering Technology and Applied Sciences

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Finite element method (FEM) was utilized to determine the natural frequency of two turbine blade materials applicable to Trans-amadi power plant in Port Harcourt, Nigeria. Comparing the two gas turbine blade materials, the fundamental frequency under the same load condition was 751Hz for IN 738 and 896Hz for U500 turbine blade material. This implies that the natural frequencies obtained for both materials were much higher than the operational frequency of 85Hz for resonance to occur. Therefore, resonance would be delayed across the blade materials in service condition, indicating that gas turbine blades designed with both materials would be dynamically stable under operational frequency approaching 745Hz. It was observed that U500 gas turbine blade material which had a higher fundamental frequency has a better mechanical properties that can undergo a longer service condition in extreme working phase before failure compared to IN 738 material. This justification was deduced from the difference between the operational frequency and the fundamental frequency; as the closer the value obtained for fundamental frequency to the operational frequency, the higher the possibility of failure and vice versa. To avoid unforeseen failure and downtime in service operation, vibration test should be conducted on routine schedule in order to meet the expected performance of the gas turbine blade.

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Investigation of turbine blade failure in a thermal power plant

Cited by 46 publications

References 4 publications

KETAHANANIMPAK,KEKERASAN DAN STRUKTUR MIKRO PADA BAJA TAHAN KARAT MARTENSITIK13 Cr3MO3Ni DENGAN VARIASI SUHU PERLAKUAN PANAS

KETAHANANIMPAK,KEKERASAN DAN STRUKTUR MIKRO PADA BAJA TAHAN KARAT MARTENSITIK13 Cr3MO3Ni DENGAN VARIASI SUHU PERLAKUAN PANAS

Corrosion-Fatigue Failure of Gas-Turbine Blades in an Oil and Gas Production Plant

Modal Analysis of Conventional Gas Turbine Blade Materials (Udimet 500 and IN738) For Industrial Applications

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