Alper İNCESU, Betül ERCAN, Engin ÇEVİK, Yasin AKGÜL

Çekme test metodu için referans malzeme geliştirme yöntemi

Referans malzemeler (RM'ler), laboratuvarların test sonuçlarının güvenilirliğini kanıtlamak için kullandıkları temel malzemelerden biridir. Bu araştırmada, ISO 6892-1'e göre çekme testlerinde kullanılmak üzere RM'nin geliştirilmesi için ön çalışmalar yapılmıştır. Bu amaçla, verilen standarda uygun EN 10130: 2006 kalite 1 mm kalınlığında çelik sacdan kemik şeklinde yassı numuneler hazırlanmıştır. Önerilen RM'nin ölçüm belirsizliği ve değer atamasının hesaplanması için homojenlik testleri ve laboratuvarlar arası karşılaştırma testleri yapılmıştır. Sonuçlar ticari sertifikalı referans malzemelerle (CRM'ler) karşılaştırıldı. Önerilen RM'nin göreceli belirsizlik değerlerinin ticari CRM'ler ile uyumlu olduğu bulundu. Bu nedenle üretilen bu RM'ler laboratuvarlar için kalite kontrol çalışmalarında kullanılabilir, ayrıca bu çalışmada önerilen üretim yolu ile her laboratuvar kendi ihtiyaçlarına göre RM üretebilir.

Anahtar Kelimeler:

Referans malzeme, ISO 6892-1, Çekme testi, çelik

Reference material development process for tensile test method

Reference materials (RMs) are one of the basic materials used by the laboratories to prove the reliability of their test results. In this research, preliminary studies have been carried out to develop RM to use in tensile tests according to ISO 6892-1. For this purpose, bone shape flat specimens were prepared from EN 10130:2006 quality 1 mm thick sheet steel related to the given standard. Homogeneity tests and inter-laboratory comparison tests were performed for calculation of measurement uncertainty and value assignment of proposed RM. Results were compared with commercial certified reference materials (CRMs). It was found that relative uncertainty values of the proposed RM were coherent with commercial CRMs. Therefore, these produced RM can be used in quality control studies for laboratories, also by the production route proposed in this study, every laboratory can be produced RM related to their needs.

Keywords:

Reference material, ISO 6892-1, Tensile test, Steel,

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