MİNYATÜR ZIMBA TESTİ İLE ISI TESİRİ ALTINDA KALAN BÖLGENİN SÜRÜNME ÖZELLİKLERİNİN BELİRLENMESİ

Bu çalışmada bir minyatür mekanik test tekniği olan Small Punch Test yönteminin kullanım alanı, prensipleri tanıtılmış ve bu test tekniği kullanılarak standart tek eksenli sürünme testiyle numune çıkarılamayacak kadar dar olan P91 çeliğinin ısı tesiri altında kalan bölgesinin ince ve kaba taneli kısımlarının sürünme davranışları belirlenmiştir. Buna göre aynı yükleme şartları altında ince taneli yapının kaba taneli yapı ve esas metale göre daha düşük sürünme özelliklerine sahip olduğu görülmektedir.

Anahtar Kelimeler:

Minyatür zımba testi; sürünme; P91 çeliği; ısı tesiri altında kalan bölge

Determination of the Creep Properties of the Heat Affected Zone by the Small Punch Miniaturized Testing Technique

In this studythe application areas and principles of the Small punch test which is a miniaturized testing technique is described and the creep behaviour of the individual zones of the Heat Affected Zoneof a P91 steel is determined which is not possible by standard uniaxial creep tests due to the insufficient material for sampling. The distinct creep properties were distinguished viz. fine grained part of the Heat Affected Zone showing inferior creep strength compared to the coarse grained Heat Affected Zone and base metal.

Keywords:

Small Punch Test; creep; P91 steel; heat affected zone,

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