2014
DOI: 10.1504/ijmmm.2014.059190
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Characterisation of surface martensite-austenite transformation during finish turning of an AISI S15500 stainless steel

Abstract: International audienceDuring machining, extreme temperature conditions appear in the cutting zone (from 700 to 1,000°C with heating rates around 106 °C/s). Consequently, the metallurgical models used to simulate the impact of the manufacturing process must be adapted to this fast thermal kinetics. Stress-free dilatometry tests have been performed to determine the austenisation kinetics of an AISI S15500 martensitic stainless steel and to identify a phenomenological model. Experimental heating rates vary from 6… Show more

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Cited by 12 publications
(8 citation statements)
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“…Indeed, Mondelin & al. [13] have shown that, during a turning operation, the very high heating and cooling rates in the cutting zone do not allow this transformation. Fig.…”
Section: Surface Integrity In Stiff Turningmentioning
confidence: 99%
“…Indeed, Mondelin & al. [13] have shown that, during a turning operation, the very high heating and cooling rates in the cutting zone do not allow this transformation. Fig.…”
Section: Surface Integrity In Stiff Turningmentioning
confidence: 99%
“…No thermally induced WEL could be observed at the circumference of the bore in any of the cross sections, although the pyrometrically measured temperatures reached values above the A C3 temperature, especially for the highest feed/cutting speed combination. Investigation on the phase transformation process for machining processes suggest, that the austenitization is not only dependent on the temperature, but also on the heating rate [14]. It is also possible that the WEL in the bore wall occurs only partially along in the microstructure along the bore wall, which will be analyzed in more detail in further investigations.…”
Section: Surface Integrity Characterizationmentioning
confidence: 94%
“…The A C3 ≈ 735 • C and A C3 ≈ 780 • C (start and end temperature of the austenite transformation) can be seen as an indicator for reaching a critical cutting parameter range. Nevertheless, especially in machining processes the high heating rates influence the phase transformation process and can increase the A c1 and A c3 temperatures [14].…”
Section: Pyrometric In-process Temperature Measurementmentioning
confidence: 99%
“…Nowadays, a law capable to do so does not exist. Moreover the microstructure evolves significantly at the solid state (recrystallization, phase transformation …) [18] and microstructural changes that restore the work hardening depend significantly on high strain rates. Therefore, material elasticity and work hardening in the cutting area are very complicated to model.…”
Section: Materials Flowmentioning
confidence: 99%