报告题目：The challenges of forming and repairing ultra high strength metals into desired shapes

主讲人：Bernard Rolfe 教授，迪肯大学 (Deakin University, Australia)

报告地点：材料学院 材料馆201

报告时间：2019年11月1日 上午10:30

校内联系人: 王同敏

【报告摘要】

Steel is an amazing material. Humans have been working, forming, and investigating steel for over 2000 years. And yet we still continue to discover more ways to create interesting steel grades. Steel offers so many paths to desired performance. Traditionally, increasing the strength of steels has been achieved by quenching (forming martensite) and micro alloying (to enable strength and formability). When we consider steel in detail we find steel also allows strengthening through grain refinement, strain hardening, solid solution alloying, precipitation hardening, and phase and twinning effects. Only a few other metals share some of this multitude of hardening options. For this presentation we will also consider titanium alloys, which also offer a similar range of hardening options.

The vital next step is to determine how to manufacture these metal alloys into high performance parts. These metals (steel and titanium) have always had a trade-off between strength and ductility, formability and cost. These days the density of the metal also has a large impact because of lightweighting for emissions reduction. The challenge always remains how to produce high strength metal parts when ductility of the metal is low.

This presentation will review the work done at Deakin on developing new ultra-high strength steel alloys, how we have investigated manufacturing paths for ultra high strength steel and titanium alloys, and how we have investigated repairing parts with a mixture of steel and titanium.

Prof Rolfe will also introduce research that is occurring at Deakin in Chemistry, Ecology, IT, and Engineering.

【主讲人简介】

Prof Bernard Rolfe is currently a Professor (Advanced Manufacturing) in the School of Engineering at Deakin University. He was the Associate Head of School (Research) from 2014-2018, responsible for growing research and research culture in the School. During his leadership the School tripled its quality journal outputs per staff member, and almost doubled income and PhD numbers. His qualifications include a combined Economics and Engineering degree with honors in 1995 from the Australian National University (ANU), and a PhD in Advanced Manufacturing (ANU) in 2002. His research group has spent 20 years working on the use of advanced metals in sheet forming primarily for the automotive sector. He was the theme leader for lightweighting at the Australian Automotive Cooperative Research Centre (2014-2017), and he is currently on the Academic Advisory Board for the International Federation of Automotive Engineering. Bernard's current research focus is the design and forming of light weight structures, including the development of better constitutive models for materials. He is also investigating design techniques for lightweighting using additive manufacturing. Bernard has received four Vice Chancellor awards and has been part of over fifteen successful nationally competitive large research grants, totalling over AUD $22 million in awarded funds. He has published over 150 refereed articles.

Research interests

Sheet Metal Forming, Material Modelling, Lightweight Design, Multi-material optimisation.

Knowledge areas

Forming lightweight structures, Sheet metal forming, Modelling Material Behaviour, Design of lightweight structures.

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