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Knife Sharpening
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  • Post #91 - February 12th, 2024, 5:39 am
    Post #91 - February 12th, 2024, 5:39 am Post #91 - February 12th, 2024, 5:39 am
    Steel has an interesting property of essentially being elastic unless you exceed the yield strength.
    You can stretch the lattice and it will return to it’s original dimensions. If you exceed the yield strength, steel will deform and not break until the Ultimate Yield Strength (UTS) is reached.
    Since your blade did not break, any stress applied was less than the UTS which leads me to believe a chip caused by a defect in the lattice or heat treat making the area brittle or commonly known as brittle fracture where the material no longer posses the elastic steel property. A microscopic study of the fracture surface can lead to a possible cause but since the area has been repaired this is not possible.
    The cause is also commonly known as ‘$hit Happens’ in the Engineering World!!!
    -Richard
  • Post #92 - February 12th, 2024, 11:03 am
    Post #92 - February 12th, 2024, 11:03 am Post #92 - February 12th, 2024, 11:03 am
    budrichard wrote:Steel has an interesting property of essentially being elastic unless you exceed the yield strength.
    You can stretch the lattice and it will return to it’s original dimensions. If you exceed the yield strength, steel will deform and not break until the Ultimate Yield Strength (UTS) is reached.
    Since your blade did not break, any stress applied was less than the UTS which leads me to believe a chip caused by a defect in the lattice or heat treat making the area brittle or commonly known as brittle fracture where the material no longer posses the elastic steel property. A microscopic study of the fracture surface can lead to a possible cause but since the area has been repaired this is not possible.
    The cause is also commonly known as ‘$hit Happens’ in the Engineering World!!!
    -Richard

    Haha - truer words! :D

    =R=
    Same planet, different world

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