Details

Autor(en) / Beteiligte

• Vanderveken, Francine
• Linsinger, Thomas
• Seghers, John

Titel

The certification of the absorbed energy (low energy) of Charpy V-notch reference test pieces for tests at 20 °C: ERM®-FA415aq : certification report

Ort / Verlag

Luxembourg: Publications Office

Erscheinungsjahr

2022

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• This certification report describes the processing and characterisation of ERM®-FA415aq, a batch of Charpy V-notch alloy steel certified reference test pieces certified for the average absorbed energy (KV). Sets of five of these test pieces are used for the indirect verification of pendulum impact test machines according to ISO 148-2 [1]. KV is operationally defined and refers to the impact energy required to break a V-notched test piece of standardised dimensions, as defined in ISO 148-1 [2]. The certified value of ERMFA415aq is made traceable to the International System of Units (SI), via the SI-traceable certified value of the master batch ERM®-FA415s [3], by testing test pieces of ERM-FA415aq and ERM-FA415s under repeatability conditions on a Charpy reference pendulum verified and calibrated with SI-traceably calibrated tools. The certified value is valid only for strikers with a 2 mm tip radius. The certified value is valid at (20 ± 2) °C. The certified value for KV and the associated expanded uncertainty (k = 2 corresponding to a confidence level of about 95 %) were calculated in accordance with ISO 17034:2016 [4] and ISO Guide 35:2017 [5] for the mean of a set of five test pieces. The uncertainty includes contributions related to possible inhomogeneity and characterisation. Before release of the certified reference material, the certification project was subjected to peerreview experts.