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Sintered Metallic Brake Pad Mechanical Behavior & Microstructure Change with Thermomechanical Stress

Name: Hoang Long Le Tran

Presentation Title: Relationship between Mechanical Behavior and Microstructure Evolution of Sintered Metallic Brake Pad under the Effect of Thermomechanical Stresses (EB2021-FBR-009)

Session: Fundamentals of Friction, Tuesday 18th May 2021, 11:00 - 12:40 (Central European Summer Time - CEST)

What do you find most interesting about the topic of your presentation?

Indeed, research with interrupted braking tests has shown that mechanical behaviors had evolved after a certain number of braking strokes. The degradation of the material properties under the effect of brake loads has been noticed in literature which is undoubtedly induced by the microstructure evolution.


When discussing this topic with industry peers, what question are you most frequently asked? How do you answer it?

The questions are: Why is there such an evolution in the material? And how it evolves within the material, in both its structure and its mechanical properties? And how does it relate to each other?


The issues are very challenging due to the complexity of braking solicitation.


In this work, in order to answer these questions without tackling it in all its complexity, a simplified experimental approach has been proposed for the first time, where physics is decoupled but still inspired by the braking sequence in terms of applied temperature and compressive load. Based on that, the impact of thermal stress and mechanical stress on the evolution of microstructure are elucidated.


Who do you think will be most interested in your presentation, and who would you most like to ask questions about it?

Our results will be of interest to the industry or researchers who are working on the sintered metallic brake pad.


What specific topics or technology are you hoping to see in other presentations or in the exhibition?

I am very interested in other topics working on the brake pad material, especially the deformation behavior, mechanical properties, and microstructure evolution.


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About Hoang Long Le Tran.

I'm currently a research engineer at LaMCube (University of Lille). I received my Ph.D. degree in material science from Grenoble-Alpes University in 2018 with the research topic on crystal growth and characteristics properties of carbide compounds at LMGP (Grenoble INP). From 2019 until now, as a post-doctoral researcher at LaMCube, my focus is on the evolution of the microstructure and related mechanical properties of the brake pad material under braking solicitation. The material in the scope is a sintered metallic composite widely used in high-energy railways.



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