A DEVICE AND A PROCESS IN A TESTING MACHINE TO DETERMINE CRACK TIP OPENING DISPLACEMENT PARAMETER OF A METALLIC COMPONENT WITH CRACK

摘要

Accordingly, an enclosing device for the subzero temperature CTOD testing comprising: a box shaped stainless steel container for housing the subzero temperature liquid coolant bath which can be used for immersing the CTOD test specimen; a insulation side cover for minimizing any heat transfer from the stainless steel container; a insulation top cover for covering the stainless steel container during the testing; a top adopter and a bottom adopter which are clamped in the top jaw and bottom jaw of the testing machine respectively; a clevis grip at the top and a clevis grip at the bottom which can be threaded to the top adopter and bottom adopter respectively; a washer to prevent any leakage of the liquid coolant bath during the testing; a lock nut for tightening the bottom adopter and the bottom clevis grip