ASM Online Member Community

  • 1.  Favorite Materials Science Demos

    Pittsburgh Chpt Admin
    Posted 08-13-2021 14:39
    Hello everyone!

    I enjoy watching science based youtube videos (probably like a fair portion of those here) but am generally surprised by the lack of quality materials science based demonstrations.  Good demonstrations, in any subject, that make a complex topic much clearer are valuable and a treat to experience.  

    I thought it might be fun to collect a group of quality demonstrations in a thread, so we can all benefit from them.  It's also healthy, in my opinion, to admit to ourselves when subjects that we're supposed to know something about are deeply unintuitive.

    So, to kick things off, here is my favorite materials science demonstration, the bubble model of crystal structures and dislocations.

    Link to Bubble Model

    The reason I like this model, and this particular video, so much is that it makes the movement of dislocations easier to visualize.  All of my courses on mechanics of materials or crystallography where line defects were a major topic left me with the impression that dislocations are rather disciplined and strict characters.  Every encounter I had personally with them were in the form of geometric figures full of angles and rotated coordinate systems, something to be experienced via trigonometry and linear algebra.  Seeing the tangle of dislocations in a TEM micrograph did little to help me either, since everything was frozen in place.  I feel this video does an excellent job of expressing the chaos of motion that occurs in a plastically deforming metal, in a way that makes both the nature and necessity of dislocations easy to grasp.

    I'm curious to see what others share!

    -Stephen

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    Stephen Rooney
    R&D Metallurgist
    Ellwood Materials Technologies
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  • 2.  RE: Favorite Materials Science Demos

    Posted 08-14-2021 13:12
    Hi Stephen,

    How to make a metallurgist feel very old. I am sure I encountered this as a black and white movie clip in my first year as an undergraduate (1966). I arrived in the Department of Metallurgy in Oxford as Prof. Sir Peter Hirsch took over from Prof. Hume-Rothery, and I think the film was inherited from Hume-Rothery. The bubble raft was also an experiment in our first year labs and it may still be. It may be that I had seen it even earlier in a lecture by Lawrence Bragg at the Royal Institution in 1964 or 65.

    Other clips that I remember are on dendritic growth filmed by Prof. John Hunt using a mixture of two organic compounds and, rather later, cement hydration filmed in an environmental cell in a TEM (I suspect the AEM 7 1MV instrument which need a whole building of its own. I looked for anything like the dendritic solidification clip on YouTube and found this

    Dendritic Solidification

    The discussion attached suggests that this is an Al-Cu alloy but I am not so sure.

    From the process end of metallurgy you can find some good videos in the world of experimental archaeology: if you type experimental archaeology iron smelting (or copper smelting or bronze casting etc.) you will find some good moves.

    ------------------------------
    Peter Northover
    Retired
    University of Oxford
    +44 1865 820543
    peter.northover@retired.ox.ac.uk
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  • 3.  RE: Favorite Materials Science Demos

    Long Island Chptr Admin
    Posted 08-16-2021 09:37
    Stephen and co -

    Some time ago, I had sent Peg and the community a brief curated list of good videos.
    See below.  Since then, I eagerly add the videos by Thom Cochell:
    https://www.youtube.com/channel/UCfO79_CEt92O2O7Su2sLlKw/playlists

    Here are some of the better channels for "materials".

    ********************************************************
    MetallurgyData
    https://www.youtube.com/channel/UCsHUpI4UfxcZtAtLXxIwsgQ
    Lots of data on steel
    ********************************************************
    Metallurgical Engineering
    https://www.youtube.com/channel/UCYDbXxnb0Vv0Ro3_Ti2Ldfg
    silent slides, but lots of overview info
    ********************************************************
    ASM webinars
    https://www.asminternational.org/news/webinars
    Not YouTube, put lots of good presentations
    ********************************************************
    Captain Corrosion
    https://www.youtube.com/user/MaidoMerisalu
    Material testing
    ********************************************************
    Materials Science 2000
    https://www.youtube.com/user/MaterialsScience2000
    Material testing
    ********************************************************
    Phase2instruments
    https://www.youtube.com/user/phase2instruments
    Metrology, surface roughness, hardness, etc... (International)
    ********************************************************
    MSI Viking
    https://www.youtube.com/user/MSIVikingGageChannel
    Metrology, surface roughness, etc... (International)
    ********************************************************
    Taylor Hobson
    https://www.youtube.com/user/TaylorHobsonUK
    Surface roughness equipment (International)

    Also, I really want to plug the "Periscope" videos.
    The are obviously dated. But full of info.

    Ditto for the BBC "craft series"..............see below.

    Engineering:
    ********************************************************
    InfinityMfg
    https://www.youtube.com/channel/UC9eqr6EBMP9cOZHwSjGeAKA
    Rich list of videos
    ********************************************************
    Practical Engineering
    https://www.youtube.com/user/gradyhillhouse
    Rich list of videos
    ********************************************************
    Real Engineering
    https://www.youtube.com/channel/UCR1IuLEqb6UEA_zQ81kwXfg
    Rich list of videos
    ********************************************************
    Engineer It
    https://www.youtube.com/channel/UCh5QPUUkuW4xo49pNgEMEZQ
    Rich list of videos
    ********************************************************
    Learn Engineering
    https://www.youtube.com/user/LearnEngineeringTeam
    Rich list of videos
    ********************************************************
    Periscope film
    https://www.youtube.com/user/PeriscopeFilm
    Old films with tons of classic info
    example: playlist on vintage steel
    ********************************************************
    Old Education Videos
    https://www.youtube.com/channel/UC6G6nfxpNP4tLZdJFIkx69w/videos
    BBC Engineering craft studies
    ********************************************************
    ********************************************************


    ------------------------------
    Jim Quinn, Dir. of Laboratories
    Stony Brook University
    Stony Brook NY
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  • 4.  RE: Favorite Materials Science Demos

    Pittsburgh Chpt Admin
    Posted 08-16-2021 13:23
    Peter - Ha ha, well this old video still is quite effective!  We did not have the bubble raft demonstration where I had undergraduate studies (though we had other great hands-on experience).

    I have seen videos like that dendrite growth video before.  When I'm trying to explain microsegregation in steels to someone, I normally resort to pictures, but this makes me think I should turn to the video!

    James - That's quite a list of videos!  Thank you for sharing.  It might take me some time to make it through them all.  Thom's videos look very educational as well.  I've seen more materials science course material uploaded to YouTube over the pandemic, a small silver lining I suppose.

    ------------------------------
    Stephen Rooney
    R&D Metallurgist
    Ellwood Materials Technologies
    ------------------------------



  • 5.  RE: Favorite Materials Science Demos

    India Chapter Admin
    Posted 09-07-2021 11:42
    Loved your share! Thanks for sharing.

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    Vivek Singal
    Mumbai
    919769208775
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  • 6.  RE: Favorite Materials Science Demos

    Posted 09-06-2021 23:13
    Wow! that was an awesome video....I share the same mental difficulties in visualizing dislocations and never could i have imagined bubble can show you that....
    thanks for sharing that....

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    sreekar parimi
    pearland TX
    9795713723
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