Influence of Density and Sintering Temperature on Smooth, Notched, and Cracked Variable Amplitude Fatigue Behaviour of FL4405 High Strength PM Steel

Poland, Dente D.; Stephens, Robert J.; Prucher, T.

doi:10.1179/pom.1998.41.4.274

Cited by 2 publications

(1 citation statement)

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“…Surface crack linking was identified in the higher porosity steel, and the tendency of linking was not found in the low porosity steel. Test results on high strength low alloy PM steel FL-4405 11 showed that lower porosities produced an increase in fatigue resistance over higher porosities, and concluded that pore size and percent porosity had a greater influence on tensile stress-strain, fracture toughness and fatigue resistance than did an increase in pore roundness.…”

Section: Influence Of Porosity On Fatigue Propertiesmentioning

confidence: 99%

Modelling and experimental study of fatigue of powder metal steel (FC-0205)

et al. 2013

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The microstructure sensitive multistage fatigue model captured the fatigue life of a powder metal FC-0205 steel alloy. Uniaxial strain controlled fatigue data and microstructure information from sets of high and low porosity specimens calibrated the model. Strain-life behaviour depicted that above the plastic strain limit of 0?002 mm mm 21 in the low cycle fatigue regime, where ubiquitous plasticity occurred, the different porosity levels gave distinct, visibly different results. However, specimens tested below the plastic limit in the high cycle fatigue regime, where failure was dominated by local cyclic microplasticity, showed unclear fatigue lives at different porosity levels. Fractography using scanning electron microscopy showed no clear presence of striations; however, asserted striations in powder metal specimens were similar to geometrical features observed on fracture surfaces of monotonically loaded specimens. The experimental and microstructure data calibrated a fatigue model that allowed for satisfactory prediction of the varying porosity specimen strain-life curves.

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Section: Influence Of Porosity On Fatigue Propertiesmentioning

confidence: 99%

Modelling and experimental study of fatigue of powder metal steel (FC-0205)

et al. 2013

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Stages of fatigue fracture in nickel alloyed powder metallurgy steel

Drar

2001

Materials Science and Technology

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Fatigue fracture of smooth rectangular specimens was investigated by testing at constant amplitude and zero mean stress, at a frequency of 30 Hz. Two nickel alloyed powder metallurgy steels with different contents of pores and MnS were examined. Fatigue fracture started with crack nucleation at pore interfaces by the formation of small steps. Growth of these nuclei was accomplished by stepwise crack tip blunting, which led to the formation of macrocracks. A dominant fatigue crack origin built up at the region of the largest number of macrocracks. Fatigue crack growth stages I, II, and III were found in this region.MST/4690

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Influence of Density and Sintering Temperature on Smooth, Notched, and Cracked Variable Amplitude Fatigue Behaviour of FL4405 High Strength PM Steel

Cited by 2 publications

References 3 publications

Modelling and experimental study of fatigue of powder metal steel (FC-0205)

Modelling and experimental study of fatigue of powder metal steel (FC-0205)

Stages of fatigue fracture in nickel alloyed powder metallurgy steel

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