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نویسندگان مقالات پربازدید :
مواد و طراحی
جزئیات رویداد
اینستاگرام تی پی بین
همایش ، رویداد ، ژورنال
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  • impact of the non-homogenous temperature distribution and the coatings process modeling on the thermal barrier coatings system

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    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 415
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
      the present study deals with a numerical investigation of the residual stresses arising during the plasma-sprayed coatings process and their effects on the final stress state of the thermal barrier coatings system (tbcs) during service. a new thermo-mechanical finite element model (fem) has been designed to function using a non-homogenous temperature distribution. several phenomena are taken into account in the model such as: residual stresses generated during the spraying of coatings, morphology of the top-coat/bond-coat interface, oxidation at the top-coat/bond-coat interface, thermal mismatch of the material components, plastic deformation of the bond-coat and creep of all layers during thermal cycling. these phenomena induce local stresses in the tbcs that are responsible of micro-crack propagation during cooling and thermal cycling, specifically near the ceramic/metal interface. the results of the non-homogenous temperature model have been compared with those of the homogenous temperature one. as a result, more stress relaxation in the hotter area due to creep and different oxide growth rate are founded in the non-homogenous temperature model.

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