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14 Feb 2020: Mechanical stabilisation of austenite. S. Chatterjee, H. S. Wang, J. R. Yang and H. K. D. H. Bhadeshia. Abstract. A theory has been developed for the mechanical stabilisation of plastically deformed austenite by balancing the force which drives the

14 Feb 2020: M. 4. C. 3. Precipitation in Fe-C-Mo-V Steels and Relationship to Hydrogen Trapping. S. Yamasaki and H. K. D. H. Bhadeshia. Abstract. Strong steels suffer from embrittlement due to dissolved hydrogen, a phenomenon which can be mitigated by trapping

14 Feb 2020: Designing low carbon, low temperature bainite. Hong-Seok Yang and H. K. D. H. Bhadeshia. Abstract. The possibility of producing bainite at low temperatures by suppressing transformation using substitutional solutes has been investigated, as an

14 Feb 2020: The OTIS KING Calculator. H. K. D. H. Bhadeshia. Before electronic calculators, slide rules were used to do quick estimates. The accuracy of a slide rule increases with its length. This is an ingenious slide rule, short in absolute length but very

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24 Jul 2020: Each is available for download in acrobat (.pdf) and gzipped postscript (.ps.gz) form, from the links below. ... converting the files, and grateful also to Jon Peatfield and Elie Bassouls who gave further advice on the technicalities of file conversions.

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14 Feb 2020: Evolution of strength and coercivity during annealing of FeCo based alloys. Department of Materials Science and Metallurgy, University of Cambridge. Pembroke Street, Cambridge CB2 3QZ, U.K. Scripta Mater 2004:51, p589-591. Abstract. Iron-cobalt

14 Feb 2020: Three-Dimensional Atom Probe Analysis of Carbon Distribution in Low-Temperature Bainite. M. Peet, S. S. Babu, M. K. Miller and H. K. D. H. Bhadeshia. The images presented below are from research described in the Scripta Materialia article available

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14 Feb 2020: Quantitative Metallography of Deformed Grains. Q. Zhu, C. M. Sellars. H. K. D. H. Bhadeshia. Abstract. The effect of plastic deformation on the grain boundary surface area per unit volume and edge length per unit volume is examined using two methods.

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14 Feb 2020: Changes in Toughness at Low Oxygen Concentrations in Steel Weld Metals. Shinichi Terashima and H. K. D. H. Bhadeshia. Abstract. Oxides in steel weld metals can initiate fracture or can improve toughness by influencing the development of beneficial

14 Feb 2020: Size distribution of oxides and toughness of steel weld metals. Shinichi Terashima and H. K. D. H. Bhadeshia. Abstract. Experiments have been conducted to modify the size distribution of oxide particles in steel weld metals which have predominantly

14 Feb 2020: Mechanically Alloyed Metals. H. K. D. H. Bhadeshia. Abstract. Mechanical alloying involves the severe deformation of mixtures of powders until they form the most intimate of atomic solutions. Inert oxides can also be introduced to form a uniform

14 Feb 2020: Annual Lecture, Royal Microscopical Society (2000): Mechanically Alloyed Metals. H. K. D. H. Bhadeshia. Abstract. Mechanical alloying involves the severe deformation of mixtures of powders until they form the most intimate of atomic solutions. Inert

14 Feb 2020: A Thermodynamic Analysis of Isothermal Transformation Diagrams. H. K. D. H. Bhadeshia. Abstract. A thermodynamic model has been developed to allow the prediction of isothermal transformation diagrams for steels, based on their chemical composition.

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14 Feb 2020: Kinetics of Simultaneous Transformations. H. K. D. H. Bhadeshia. Abstract. It is often the case that a number of solid--state transformations occur concurrently, starting from the same parent phase. The transformations may occur at different rates,

14 Feb 2020: Heterogeneous Deformation and Recrystallisation of Iron-Base ODS PM2000 Alloy. C. Capdevila, Y. L. Chen, N. C. K. Lassen, A. R. Jones and H. K. D. H. Bhadeshia. Abstract. The recrystallisation behaviour of PM2000 oxide dispersion strengthened

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14 Feb 2020: Three-Dimensional Atom Probe Analysis of Carbon Distribution in Low-Temperature Bainite. M. Peet, S. S. Babu, M. K. Miller and H. K. D. H. Bhadeshia. Abstract. A bainitic microstructure with fine ferrite plates (20 to 40 nm) in a matrix of

14 Feb 2020: Modelling of Phase Transformations in Steel Weld Metal. H. K. D. H. Bhadeshia. Abstract. This paper deals with some of the latest issues in the modelling of steel weld microstructures, building on work already published in the open literature. The

14 Feb 2020: Welding Procedures and Type IV Phenomena. J. A. Francis, W. Mazur and H. K. D. H. Bhadeshia. Abstract. In this work, we attempt a quantitative estimation of the type IV rupture stress for welds in ferritic power plant steels containing 9-12 wt. %

14 Feb 2020: Residual Stress Part 1 - Measurement Techniques. P. J. Withers and H. K. D. H. Bhadeshia. Abstract. Residual stress is that which remains in a body which is stationary and at equilibrium with its surroundings. It can be very detrimental to the

14 Feb 2020: Plastic strain due to twinning in austenitic TWIP steels. B. Qin and H. K. D. H. Bhadeshia. Abstract. Twinning induced plasticity steels are austenitic alloys in which mechanical twinning is a prominent deformation mode, and which exhibit

14 Feb 2020: Synchrotron X-ray Studies of Austenite and Bainitic Ferrite. H. J. Stone, M. J. Peet, H. K. D. H. Bhadeshia, P. J. Withers, S. S. Babu, E. D. Specht. Abstract. High resolution synchrotron X--ray diffraction has been used to conduct in situ studies

14 Feb 2020: The Charpy Impact Transition Temperature for some Ferritic Steel Welds. S. H. Lalam, H. K. D. H. Bhadeshia and D. J. C. MacKay. Abstract. Body-centered cubic iron undergoes a ductile-brittle fracture transition as a function of temperature. A common

14 Feb 2020: Acceleration of Low-Temperature Bainite. C. Garcia Mateo, F. G. Caballero and H. K. D. H. Bhadeshia. Abstract. Recent work has shown that bainitic ferrite plates produced by transformation at low temperatures can be as thin as 20 nm with a hardness

14 Feb 2020: Residual Stress Part 2 - Nature and Origins. P. J. Withers and H. K. D. H. Bhadeshia. Abstract. Residual stress is that which remains in a body which is stationary and at equilibrium with its surroundings. It can be detrimental when it reduces the

14 Feb 2020: Low Temperature Bainite. C. Garcia-Mateo, F. G. Caballero and H. K. D. H. Bhadeshia. Abstract. It is demonstrated that bainite can be obtained by isothermal transformation at a temperature which is so low that the calculated diffusion distance of an

14 Feb 2020: Bainite Transformation Kinetics, Part I, Modified Model. G. I. Rees and H. K. D. H. Bhadeshia. Abstract. An earlier model for the overall transformation kinetics of bainite has been corrected and modified to be consistent with known details of the

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14 Feb 2020: Crystal structure of lithium niobate. H. K. D. H. Bhadeshia. The crystal structure of lithium niobate, space group R3c and lattice parameters 0.5418 and 1.3863 nm (H. E. Megaw, Acta Cryst. A24 [1968] 583). The chemical formula is LiNbO.

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14 Feb 2020: Quantitative Alloy Design Tools for Ni--Base Superalloys. Final Report EPSRC Grant GR/K23263. Principal Investigator: Dr. H.K.D.H. Bhadeshia. Introduction. The development of new nickel alloys for aeroengine applications is a difficult taks,

14 Feb 2020: The Bainite Transformation: Unresolved Issues. H. K. D. H. Bhadeshia. Abstract. A great deal of research, over many decades since the discovery of bainite, has revealed substantial information about the mechanism of the bainite transformation in

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14 Feb 2020: Some Phase Transformations in Steels. H. K. D. H. Bhadeshia. Abstract. Many essential properties of iron alloys depend on the atomic mechanism of phase change. Following a description of the mechanisms established for solid state phase

14 Feb 2020: Modelling of kinetics and dilatometric behaviour of non-isothermal pearlite-to-austenite transformation in an eutectoid steel. C. G. deAndres, C. Capdevila, F. G. Caballero and H. K. D. H. Bhadeshia. Abstract. The formation of austenite during the

14 Feb 2020: Bayesian Neural Network Model for Austenite Formation in Steels. L. Gavard, H. K. D. H. Bhadeshia, D. J. C. MacKay and S. Suzuki. Abstract. The formation of austenite during the continuous heating of steels has been investigated using neural network

14 Feb 2020: Topology of Grain Deformation. S. B. Singh and H. K. D. H. Bhadeshia. Abstract. The deformation of a polycrystalline material leads to changes in the amount of grain surface and grain edge per unit volume. These parameters are of importance in

14 Feb 2020: Bainite Transformation Kinetics, Part II, Non-uniform distribution of carbon. G. I. Rees and H. K. D. H. Bhadeshia. Abstract. The carbon concentration trapped in films of austenite between parallel platelets of bainite is often found to be much

14 Feb 2020: Effect of Strain Heterogeneity on Recrystallisation of PM2000. C. Capdevila, Y. L. Chen, A. R. Jones and H. K. D. H. Bhadeshia. Abstract. The recrystallisation behaviour of PM2000 oxide dispersion strengthened ferritic alloy has been investigated

14 Feb 2020: Refinement and characterisation of a thermodynamically stable metal-metal composite. J. D. Robson and H. K. D. H. Bhadeshia. Abstract. The intermetallic compounds which are under consideration for use in aerospace applications often suffer from

14 Feb 2020: Estimation of the Mechanical Properties of Ferritic Steel Welds,. Part I: Yield and Tensile Strength. S. H. Lalam, H. K. D. H. Bhadeshia and D. J. C. MacKay. Abstract. The yield strength and ultimate tensile strength of ferritic steel weld metal

14 Feb 2020: Estimation of the Mechanical Properties of Ferritic Steel Welds,. Part II: Elongation and Charpy Toughness. S. H. Lalam, H. K. D. H. Bhadeshia and D. J. C. MacKay. Abstract. In previous work we presented models which can be used to estimate the

14 Feb 2020: Reliability of Weld Microstructure and Property Calculations. H. K. D. H. Bhadeshia. Abstract. We depend in our everyday life on the performance of vast quantities of steel, which we use without giving it a second thought. This is possible because