Low cycle fatigue, deformation and fracture behaviour of Inconel 617 alloy

Rao, C. V. S. Kameswara; Srinivas, N.C. Santhi; Sastry, G. V. S.; Singh, Vakil

doi:10.1016/j.msea.2019.138286

Cited by 44 publications

(17 citation statements)

References 34 publications

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“…It is generally accepted that the cyclic stress response behavior and LCF life feature are mainly determined by the underlying LCF crack initiation and propagation [24,25]. Figure 9 shows the TEM images of fractured fatigue samples.…”

Section: Discussionmentioning

confidence: 99%

Low-cycle fatigue behavior of Ti-6Mo-5V-3Al-2Fe alloy with various types of secondary α phase

Zhang

Zhengyuan

et al. 2020

Mater. Res. Express

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Low-cycle fatigue (LCF) behavior of a novel near β titanium alloy Ti-6Mo-5V-3Al-2Fe (wt%) with various types of secondary α phase was investigated. Results indicate that No.1 microstructure containing crossed and fine intragranular α, as well as discontinuous GB α, is obtained through low temperature (480°C) aging treatment. No.2 microstructure containing parallel and coarse intragranular α, as well as parallel WGB α, forms after high temperature (600°C) aging treatment. Under all strain amplitudes, stress amplitudes and LCF life of the samples with No.1 microstructure are higher than those of the samples with No.2 microstructure. For the samples with No.1 microstructure, more and deeper secondary cracks and dimples form in fatigue crack propagation and fast fracture regions, respectively. Such fatigue fracture behavior reflects a longer LCF life. OPEN ACCESS RECEIVED

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Section: Discussionmentioning

confidence: 99%

Low-cycle fatigue behavior of Ti-6Mo-5V-3Al-2Fe alloy with various types of secondary α phase

Zhang

Zhengyuan

et al. 2020

Mater. Res. Express

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“…Nickel-based superalloy with nickel as the matrix, adding W, Mo, Ti, Al, Nb, Co and other strengthening elements, has excellent high-temperature thermal strength, creep resistance and high-temperature fatigue strength [ 1 ]. The material is widely applied to fabricate structural components [ 2 ] in the aerospace field of 900~1050 °C temperature, such as aero-engine blades [ 3 , 4 , 5 ], turbine discs [ 6 ], combustors [ 7 ], etc.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Strain Fatigue Behavior for Inconel 625 with Laser Shock Peening

Sun

Han

et al. 2022

Materials

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With excellent creep resistance, high-temperature thermal strength and high-temperature fatigue strength, Inconel 625 is widely applied to fabricate structural components in the aerospace field, where fatigue life is a key point. Laser shock peening (LSP) is considered to improve the fatigue strength and fatigue crack growth resistance of metal materials. The present work was conducted to investigate the influence of LSP on strain-controlled fatigue behavior of Inconel 625. The surface microstructures of specimens before and after LSP were observed by transmission electron microscope (TEM). The strain-controlled fatigue loading tests with different strain amplitudes ranging from 0.4% to 1.2% were carried out on the specimens, and the topography of fracture appearance was examined by scanning electron microscope (SEM). The investigations showed that the specimens with LSP presented fewer crack initiations, shorter fatigue striations space and smaller dimples or micropores, which account for the enhancement of the fatigue life for the LSP specimens. Furthermore, the plastic deformation, ultra-fine grains, twins and dislocations caused by LSP could prevent crack initiation, crack propagation and ultimate fracture, hence prolonging the fatigue life of the Inconel 625. In addition, it was revealed that the cyclic strain hardening as well as cyclic strain softening remains almost the same to Inconel 625 with or without LSP.

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“…During the past several decades, considerable efforts have been focused on the cyclic deformation behavior and corresponding microscopic physical mechanism of ASS, including types of Cr-Ni-Fe alloy (such as 316L [ 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ], 304 [ 16 , 17 , 18 ], Sancro 25 [ 19 , 20 , 21 , 22 , 23 ] and Inconel 617 [ 24 ]) and rich-Mn alloy (Hadfield steel [ 25 , 26 , 27 ]). It has been widely recognized that transient cyclic hardening followed by long-term cyclic softening is the main macroscopic characteristic for ASSs under strain-controlled cyclic loading at the room temperature.…”

Section: Introductionmentioning

confidence: 99%

“…The deformation-induced martensitic transformation is regarded as the main mechanism for the secondary cyclic hardening of ASS under larger cyclic amplitudes [ 16 ]. In addition, at elevated temperatures, the dynamic strain aging effect, creep, oxidation and their interaction play a more important role in cyclic deformation behavior of the ASS, and lead to more pronounced cyclic hardening behavior and a shorter fatigue life [ 19 , 20 , 21 , 22 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

A Comparison of Amplitude-and Time-Dependent Cyclic Deformation Behavior for Fully-Austenite Stainless Steel 316L and Duplex Stainless Steel 2205

Li¹,

Jiang²,

Xie³

et al. 2021

Materials

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Austenite and duplex stainless steels are widely used in engineering, and the latter exhibits a more excellent combination of mechanical properties and corrosion resistance due to the coexistence of austenite and ferrite and higher nitrogen. However, fatigue failure still threatens their structural integrity. A comprehensive comparison of their cyclic deformation behavior is a major foundation to understand the role of duplex-phase microstructure and nitrogen in the safety assessment of engineering components. Thus, in this paper, the cyclic deformation behavior of fully-austenitic stainless steel 316L and duplex stainless steel 2205 was studied by a series of low cycle fatigue tests with various strain amplitudes, loading rates and tensile holding. A theoretical mechanism diagram of the interaction between nitrogen and dislocation movements during cyclic loads was proposed. Results show that the cyclic stress response of 2205 was the primary cyclic hardening, followed by a long-term cyclic softening regardless of strain amplitudes and rates, while an additional secondary hardening was observed for 316L at greater strain amplitudes. Cyclic softening of 2205 was restrained under slower strain rates or tensile holding due to the interaction between nitrogen and dislocations. The cyclic plasticity of 2205 started within the austenite, and gradually translated into the ferrite with the elevation of the cyclic amplitude, which lead to a decreased hardening ratio with the increase in amplitude and a shorter fatigue life for a given smaller plastic strain amplitude.

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Low cycle fatigue, deformation and fracture behaviour of Inconel 617 alloy

Cited by 44 publications

References 34 publications

Low-cycle fatigue behavior of Ti-6Mo-5V-3Al-2Fe alloy with various types of secondary α phase

Low-cycle fatigue behavior of Ti-6Mo-5V-3Al-2Fe alloy with various types of secondary α phase

Investigation of Strain Fatigue Behavior for Inconel 625 with Laser Shock Peening

A Comparison of Amplitude-and Time-Dependent Cyclic Deformation Behavior for Fully-Austenite Stainless Steel 316L and Duplex Stainless Steel 2205

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