1 Introduction

    The physical, thermophysical and mechanical properties of materials are vital inputs for process design/modelling. However, while such pro-perties are relatively easy to measure at room temperature, they become increasingly difficult or even impossible to determine experimentally at high temperatures. To overcome these difficulties and provide reliable and cost effective data for process modelling, sound physical models are required so that such properties can be readily calculated. The present paper demonstrates the capabilities of a well-established computer software JMatPro that is able to provide many of the properties required.[1,2]

    In earlier papers, capabilities of JMatPro on titanium alloys have been introduced in details.[,]34 Phase diagram modelling has reached a stage where light elements C, O and N can be accurately accounted for in titanium alloys. Not only are critical features such as the β-transus predicted successfully but further information such as the amount of α and β as a function of temperature, elemental partitioning, and activity of all elements are all readily obtained.[3] JMatPro can also provide a wide range of information regarding TTT/CCT diagrams, mechanical properties, physical and thermophysical properties for titanium alloys.[4] The calculations utilise well-established material models and have taken into account the effect of microstructure. It is the aim of this paper to demonstrate some new features of the JMatPro software on calculation the properties and behaviour of titanium alloys, concentrating on the following two areas:

● Physical and thermophysical properties are critical to cast/solidification simulation. These properties are calculated for the whole temperature range including in the liquid phase. Where relevant, properties are given for each phase.

● High temperature mechanical properties, including creep properties and high temperature strength. The proof/tensile strength and hardness are calculated at any temperature up to the melting point.

The calculated results have been extensively validated against experiment for a wide range of commercial titanium alloys.

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