Study of Damage Propagation and Life Assessment in High Temperature Cyclic Loading

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MIR A.; AGHAIE KHAFRI M.

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Journal Paper

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Journal: Modares Mechanical Engineering Year:2019 | Volume:19 | Issue:3 Page(s): 731-742

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Information Journal Paper

Title

Study of Damage Propagation and Life Assessment in High Temperature Cyclic Loading

Author(s)

MIR A. | AGHAIE KHAFRI M. | Issue Writer Certificate

Keywords

LifeQ1

DamageQ2

FatigueQ2

Stainless SteelQ1

Turbine BladesQ2

Abstract

The aim of this study is to investigate the Life-span according to the Damage caused by the main mechanisms of Damage development in Turbine Blades and to model the growth of the Damage. For this purpose, the low cycle Fatigue test on martensitic 410 Stainless Steel was immersed in tempered glass at 565° C in three strain gauges 0. 8, 1 and 1. 5 with a constant temperature of 500° C and 15 seconds per cycle. The effect of creep-Fatigue interaction on Life and also Damage to turbine blade in different conditions was investigated. The results showed that with the variation of the strain amplitude from 0. 8 to 1. 5, the Life of the piece varies from 205 to 65 cycles and this is while the level of failure of the samples varies. In the next step, the modified Coffin-Manson model was used to indicate the Damage and its simultaneous effect on the Life of the piece. The results showed that decreasing the number of grain boundaries and its effect on the cavities created in the piece decreases the Damage and thus the Life of the turbine blade increases. High-temperature tensile tests and low-tensile Fatigue-temperature control were also performed in different tempering modes for 410 and 420 steel Stainless Steel and The results showed that, under the same conditions, the temperature increase from 200 to 565° C resulted in a decrease in Life from 2218 to 1952 cycles.

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APA: Copy

MIR, A., & AGHAIE KHAFRI, M.. (2019). Study of Damage Propagation and Life Assessment in High Temperature Cyclic Loading. MODARES MECHANICAL ENGINEERING, 19(3 ), 731-742. SID. https://sid.ir/paper/179849/en

Vancouver: Copy

MIR A., AGHAIE KHAFRI M.. Study of Damage Propagation and Life Assessment in High Temperature Cyclic Loading. MODARES MECHANICAL ENGINEERING[Internet]. 2019;19(3 ):731-742. Available from: https://sid.ir/paper/179849/en

IEEE: Copy

A. MIR, and M. AGHAIE KHAFRI, “Study of Damage Propagation and Life Assessment in High Temperature Cyclic Loading,” MODARES MECHANICAL ENGINEERING, vol. 19, no. 3 , pp. 731–742, 2019, [Online]. Available: https://sid.ir/paper/179849/en

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