Dr. Peter Collins, Professor and Associate Chair from Department of Materials Science and Engineering, Iowa State University will give a seminar titled "Predicting properties and performance, and assuring quality in additively manufactured titanium alloys" to the interested faculty and students at Discovery Park.

Abstract

An Integrated Computational Materials Engineering (ICME) framework has been developed and applied for multiple variants of large-area additive manufacturing of the aerospace alloy Ti-6Al-4V. The approach permits the integration of (i) mesoscopic models of heat-transfer and a moving energy source with (ii) kinetic and thermodynamic models for the prediction of key aspects of the materials state and the subsequent (iii) uniaxial tensile properties and (iv) statistical methods of developing so-called “design allowable curves”. This previous effort has demonstrated which aspects of the materials state seem to matter for this particular alloy, as well as correlated features that could be measured. As a result of this effort, we have demonstrated that certain models can be applied to other alloys and processes. We have also observed key technology gaps, and have pursued new directions for fundamental research to address these gaps. One example will be given, which is the development of a new microscope capable of conducting a type of orientation microscopy over very large areas. This microscope has opened exciting new research opportunities related to nondestructively assessing materials state.

Biography

P. C. Collins is a Professor and Associate Chair within the Department of Materials Science and Engineering at Iowa State University, holds the Stanley Chaired Professorship in Interdisciplinary Engineering.  He received his PhD from The Ohio State University in Materials Science and Engineering. Prior to starting in his first university role (at UNT), he set up a not-for-profit advanced manufacturing facility embedded in an Army Arsenal. His primary research interests involve: the physical metallurgy of advanced non-ferrous materials; advanced characterization techniques including various electron microscopies and emergent spectroscopic methods; quantification of defects and crystal orientation across length scales; combinatorial materials science; advanced materials processing with special interest in additive manufacturing and gradient materials; and the mechanical behavior of non-ferrous materials, including predicting composition-microstructure-property relationships.  He has conducted basic and applied research on metal-based additive manufacturing for over 20 years, and most recently has worked to demonstrate new methods to fully characterize the materials state of additively manufactured metallic systems across all length scales. He has received multiple awards for teaching and his research, and has been actively involved in a variety of professional societies, planning of conferences and symposia, various government panels and working groups, and has ~75 publications, >50 invited talks, and multiple US patents.