Adventures in the Physical Metallurgy of Steels: Recent Episodes
Cambridge University
Proceedings of a conference held in Cambridge to highlight the most adventurous and risky topics in the physical metallurgy of steels.
A lecture given by Peter Olund, at the Adventures in the Physical Metallurgy of Steels (APMS) conference held in Cambridge University. With the focus on steels for bearings, he talks about the role of inclusions in determining the anisotropy of fatigue properties, and of sampling volume effects. The presentation file can be downloaded from http://www.msm.cam.ac.uk/apms/ http://www.msm.cam.ac.uk/phase-trans
The demands of high cleanliness steel constantly increases due to the fact that higher loads are being introduced in the applications. Today there are cases where the elongated sulphide inclusions present in steel with "normal" sulphur content (around 80ppm) will cause premature fatigue failures. A clear trend is therefore reduced sulphur contents in air-melted steels. However, only increasing the desulphurization within the current process window, to produce low sulphur contents (less than 20ppm), will due to thermodynamics drastically increase the number and size of detrimental globular calcium aluminates. Re-melting process has therefore dominated the market for low sulphur steel. Recently, air-melt steel making processes have been developed to produce more isotropic low sulphur steel where the formation of large globular calcium alumina is thermodynamically suppressed. Consequently, steels produced with this process will exhibit more isotropic fatigue properties.
In this work fatigue properties has been assessed for steels loaded in different directions with reference to the rolling direction for steels with different level of isotropy. Furthermore, the effect on operation temperature has been taking into account showing that moderate increases in temperature will affect the properties. This influence can be correlated to the microstructural stability, i.e. composition and structure, of the steel.
A lecture given by K. Fang, at the Adventures in the Physical Metallurgy of Steels (APMS) conference held in Cambridge University. Nanostructured bainite is incredibly difficult to weld because of its high carbon concentration. Here an innovative method is presented to resolve the weldability. The presentation file can be downloaded from http://www.msm.cam.ac.uk/apms/ http://www.msm.cam.ac.uk/phase-trans
A lecture given by Jer Ren Yang, at the Adventures in the Physical Metallurgy of Steels (APMS) conference held in Cambridge University. The metallurgy of a new, microalloyed bainitic steel that is capable of secondary hardening, accompanied by a simultaneous increase in strength and ductility is introduced. The presentation file can be downloaded from http://www.msm.cam.ac.uk/apms/ http://www.msm.cam.ac.uk/phase-trans
A lecture given by Saurabh Kundu, at the Adventures in the Physical Metallurgy of Steels (APMS) conference held in Cambridge University. Theory for the selection of specific crystallographic variants out of all possible variant, when steel is transformed into bainite, martensite or in general, displacive phase transformation products. The presentation file can be downloaded from http://www.msm.cam.ac.uk/apms/ http://www.msm.cam.ac.uk/phase-trans
A lecture given by John Speer, at the Adventures in the Physical Metallurgy of Steels (APMS) conference held in Cambridge University. The quench and partitioning process involves partial transformation to martensite, followed by an increase in temperature to permit the excess carbon to partition into the residual austenite. The presentation file can be downloaded from http://www.msm.cam.ac.uk/apms/ http://www.msm.cam.ac.uk/phase-trans
A lecture given by Igor Abrikosov, at the Adventures in the Physical Metallurgy of Steels (APMS) conference held in Cambridge University. The emphasis is on how magentic properties play a role in the properties of iron. The presentation file can be downloaded from http://www.msm.cam.ac.uk/apms/ http://www.msm.cam.ac.uk/phase-trans
A meeting dealing with some of the most adventurous topics in the physical metallurgy of steels