The Pin-Loaded Small One-Bar Specimen in Use to Determine Uniaxial and Multiaxial Creep Data

High Temperature Materials and Processes

Ali Balhassn S. M.¹ 

[1] Department of Mechanical and Industrial Engineering, Bursa Orhangazi University, Bursa, Turkey;

关键词: small one-bar specimen;    small notched specimen;    conversion factors;    conversion relationship;    creep assessment;   

DOI  :  10.1515/htmp-2015-0029

来源: DOAJ

【 摘 要 】

Two novel small specimen creep testing techniques are presented in this paper. The pin-loaded small one-bar specimen (OBS) and the small notched specimen with four loading pins (SNS4) are designed to determine the remaining lifetime for the high-temperature components. The small OBS is suitable for use in obtaining both uniaxial creep strain and creep rupture life data and the SNS4 is designed to obtain the multiaxial behaviour using small material samples. The specimens can be made from small material samples removed from the component surface or from the heat-affected zone. The specimens can be loaded through pin connections for testing. A conversion relationship and conversion factor have been obtained and used to convert the OBS creep data to the corresponding uniaxial data. For validation two materials have been used, P92 and P91 steels at 650°C. The advantages of these testing techniques are highlighted; the recommendations for future research are also given.

【 授权许可】

Unknown