BS ISO 26843:2015 - Metallic materials. Measurement of fracture toughness at impact loading rates using precracked Charpy-type test pieces

BS ISO 26843:2015

Metallic materials. Measurement of fracture toughness at impact loading rates using precracked Charpy-type test pieces

Status : Current, Under review   Published : December 2015

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PDF

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HARDCOPY



This International Standard specifies requirements for performing and evaluating instrumented precracked Charpy impact tests on metallic materials using a fracture mechanics approach. Minimum requirements are given for measurement and recording equipment such that similar sensitivity and comparable measurements are achieved.

Dynamic fracture mechanics properties determined using this International Standard are comparable with conventional large-scale fracture mechanics results when the corresponding validity criteria are met. Because of the small absolute size of the Charpy specimen, this is often not the case. Nevertheless, the values obtained can be used in research and development of materials, in quality control, and to establish the variation of properties with test temperature under impact loading rates.

Fracture toughness properties determined through the use of this International Standard may differ from values measured at quasistatic loading rates. Indeed, an increase in loading rate causes a decrease in fracture toughness when tests are performed in the brittle or ductile-to-brittle regimes; the opposite is observed (i.e. increase in fracture toughness) in the fully ductile regime. More information on the dependence of fracture toughness on loading (or strain) rate is given in Reference [1]. In addition, it is generally acknowledged that fracture toughness also depends on test temperature. For these reasons, the user is required to report the actual test temperature and loading rate for each test performed.

In case of cleavage fracture of ferritic steels in the ductile-to-brittle transition region, variability can be very large and cannot be adequately described by simple statistics. In this case, additional tests are required and the analysis is to be performed using a statistical procedure applicable to this type of test, see for example Reference [2].

NOTE

Modifications to the analytical procedures prescribed in Reference [2] might be necessary to account for the effect of elevated (impact) loading rates.




Standard NumberBS ISO 26843:2015
TitleMetallic materials. Measurement of fracture toughness at impact loading rates using precracked Charpy-type test pieces
StatusCurrent, Under review
Publication Date31 December 2015
Normative References(Required to achieve compliance to this standard)ISO 14556, ISO 148-1, ISO 26203-2, ISO 148-2, ISO 12135
Informative References(Provided for Information)No other standards are informatively referenced
International RelationshipsISO 26843:2015
Draft Superseded By15/30319081 DC
DescriptorsAdhesive-bonded joints, Adhesives, Selection, Test specimens, Grades (quality), Delamination, Internal, Laminates, Wood, Wood products, Environmental testing, Thermal-cycling tests, Damp-heat tests, Performance testing
ICS77.040.10
Title in FrenchMatériaux métalliques. Mesure de la ténacité d’éprouvettes type Charpy préfissurées soumises à un chargement d’impact
CommitteeISE/101/4
ISBN978 0 580 89332 2
PublisherBSI
FormatA4
DeliveryYes
Pages46
File Size2.371 MB
Price£246.00


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