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- Duine, P.A. (author), Sietsma, J. (author), van den Beukel, A. (author) journal article 1993
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- Duine, P.A. (author), Sietsma, J. (author), Thijsse, B.J. (author), Pusztai, L. (author) journal article 1994
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- Sietsma, J. (author), Thijsse, B.J. (author) journal article 1995
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- Krielaart, G.P. (author), Sietsma, J. (author), Van der Zwaag, S. (author) journal article 1997
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- Ruitenberg, G. (author), De Hey, P. (author), Sommer, F. (author), Sietsma, J. (author) journal article 1997
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- Te Velthuis, S.G.E. (author), Rekveldt, M.T. (author), Sietsma, J. (author), Van der Zwaag, S. (author) journal article 1997
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- van Ee, L.D. (author), Thijsse, B.J. (author), Sietsma, J. (author) journal article 1998
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Rivera-Diaz-Del-Castillo, P.E.J. (author), Sietsma, J. (author), Van der Zwaag, S. (author)A model for predicting the conditions under which ferrite/pearlite band formation occurs, and therefore the conditions in which it can be avoided in steels, has been developed. The model requires as input the alloy composition and microchemical segregation wavelength, and provides in turn the homogenization temperature and time in which the...journal article 2004
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- Bos, C. (author), Sietsma, J. (author), Thijsse, B.J. (author) journal article 2006
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Van Bohemen, S.M.C. (author), Sietsma, J. (author), Van der Zwaag, S. (author)The formation mechanisms of two hcp ? phase morphologies in Ti-4.5Fe-6.8Mo-1.5Al have been investigated by optical microscopy (OM), atomic force microscopy (AFM), electron probe microanalysis (EPMA) and dilatometry. At relatively high temperatures primary ? forms predominantly on prior bcc ? grain boundaries, whereas at lower temperatures so...journal article 2006
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Savran, V.I. (author), Van Leeuwen, Y. (author), Hanlon, D.N. (author), Kwakernaak, C. (author), Sloof, W.G. (author), Sietsma, J. (author)The microstructural evolution during continuous heating experiments has been studied for two C-Mn steels with carbon contents in the range 0.35 to 0.45 wt pct using optical microscopy, scanning electron microscopy (SEM), and electron probe microanalysis (EPMA). It is shown that the formation of the austenitic phase is possible in pearlite as...journal article 2007
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Luzginova, N.V. (author), Zhao, L. (author), Sietsma, J. (author)The cementite spheroidization process is investigated in hypereutectoid steels with different chromium (Cr) contents. A spheroidized structure in high-carbon steel is usually obtained by a divorced eutectoid transformation (DET) reaction, which occurs during slow cooling of austenite with fine cementite particles. A bimodal distribution of...journal article 2008
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Mecozzi, M.G. (author), Militzer, M. (author), Sietsma, J. (author), Van der Zwaag, S. (author)Three-dimensional (3-D) phase-field simulations of the austenite (?) to ferrite (?) transformation during continuous cooling at different cooling rates were performed for an Fe-0.10C-0.49Mn (wt pct) steel, with the aim of studying the interaction between the assumed nucleation temperature range and the effective interfacial mobility when fitting...journal article 2008
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Santofimia, M.J. (author), Zhao, L. (author), Sietsma, J. (author)The “quenching and partitioning” (Q&P) process has been studied in a low-carbon steel containing 1.1 wt pct aluminum by heat treatments consisting of partial austenitization at 900 °C and subsequent rapid cooling to a quenching temperature in the range between 125 °C and 175 °C, followed by an isothermal treatment (partitioning step) at 250 °C...journal article 2008
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Santofimia, Maria Jesus (author), Speer, JG (author), Clarke, AJ (author), Zhao, L. (author), Sietsma, J. (author)The quenching and partitioning (Q&P) process is a new heat treatment for the creation of advanced high-strength steels. This treatment consists of an initial partial or full austenitization, followed by a quench to form a controlled amount of martensite and an annealing step to partition carbon atoms from the martensite to the austenite. In...journal article 2009
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Van Bohemen, S.M.C. (author), Sietsma, J. (author)The progress of martensite formation in plain carbon steels Fe-0.46C, Fe-0.66C, and Fe-0.80C has been investigated by dilatometry. It is demonstrated that carbon enrichment of the remaining austenite due to intercritical annealing of Fe-0.46C and Fe-0.66C does not only depress the start temperature for martensite, but also slows the progress of...journal article 2009
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Savran, V.I. (author), Offerman, S.E. (author), Sietsma, J. (author)Austenite nucleation and growth is studied during continuous heating using three-dimensional X-ray diffraction (3-D XRD) microscopy at the European Synchrotron Radiation Facility (ESRF) (Grenoble, France). Unique in-situ observations of austenite nucleation and growth kinetics were made for two commercial medium-carbon low-alloy steels (0.21 and...journal article 2010
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Santofimia, Maria Jesus (author), Zhao, L. (author), Petrov, R.H. (author), Kwakernaak, C. (author), Sloof, W.G. (author), Sietsma, J. (author)This paper presents a detailed characterization of the microstructural development of a new quenching and partitioning (Q&P) steel. Q&P treatments, starting from full austenitization, were applied to the developed steel, leading to microstructures containing volume fractions of retained austenite of up to 0.15. The austenite was...journal article 2011
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Santofimia, M.J. (author), Zhao, L. (author), Sietsma, J. (author)The application of the quenching and partitioning (Q&P) process in steels involves a microstructural evolution that is more complex than just the formation of martensite followed by carbon partitioning from martensite to austenite. Examples of this complexity are the formation of epitaxial ferrite during the first quenching step and the...journal article 2011
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Tirumalasetty, G.K. (author), Van Huis, M.A. (author), Fang, C.M. (author), Xu, Q. (author), Tichelaar, F.D. (author), Hanlon, D.N. (author), Sietsma, J. (author), Zandbergen, H.W. (author)Multiphase steels utilising composite strengthening may be further strengthened via grain refinement or precipitation by the addition of microalloying elements. In this study a Nb microalloyed steel comprising martensite, bainite and retained austenite has been studied. By means of transmission electron microscopy (TEM), we have investigated the...journal article 2011