• determination of constitutive response of plastically graded materials

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 708
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     plastically graded materials (pgms) are frequently used in high-performance tribological components such as case-hardened gears and bearings for jet and rocket engines due to their superior resistance to rolling contact fatigue. these components can have a surface hardness as high as 9 gpa and a decreasing hardness gradient over a depth of approximately 2 mm. this hardness gradient is achieved by a gradient in carbon content. proper design of such components requires the knowledge of the constitutive response with depth. in this manuscript, a coordinated experimental and numerical method is presented to extract the constitutive response of commercially available case-hardened pyrowear 675 (p675) stainless steel. utilizing the variation in micro-vickers hardness with depth for both virgin and plastically deformed pgms, representative plastic strain, and well established hardness-yield strength relationships, the constitutive response of the pgm is uniquely determined. it is shown that this specific pgm has a linear variation in yield strength, but a constant strain hardening exponent. the procedure developed here can assist in surface engineering a pgm with optimized hardness profiles to maximize tribological performance.

سوال خود را در مورد این مقاله مطرح نمایید :

با انتخاب دکمه ثبت پرسش، موافقت خود را با قوانین انتشار محتوا در وبسایت تی پی بین اعلام می کنم