BS 7448-2:1997
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Fracture mechanics toughness tests Method for determination of KIc, critical CTOD and critical J values of welds in metallic materials
Hardcopy , PDF
31-07-2010
English
15-08-1997
Foreword
1 Scope
2 References
3 Definitions
4 Symbols and designations
5 Principle
6 Choice of specimen design, orientation and notch
location
7 Pre-machining metallography
8 Machining
9 Specimen preparation
10 Test procedure for KIc, CTOD (or o) and J tests
11 Post-test metallography
12 Post-test analysis
13 Test report
Annexes
a (informative) Example notch locations
B (informative) Example of pre-test metallography
C (informative) Example of post-test metallography
D (informative) Residual stress modification and
pre-cracking technique
E (normative) assessment of pop-in
Figures
1 Test method flow chart for BS 7448:Part 2
2 Crack plane orientation code for welded fracture
toughness specimens (defined relative to weld
direction)
3 Proportional dimensions and tolerances for rectangular
section bend specimens and square section bend specimens
4 Acceptable tolerances for misalignment, distortion and
curvature in single edge notch bend specimens
5 Method for straightening bend specimen blanks
6 Notch placement procedure using construction lines
in a through thickness notched specimen
7 Notch placement procedure in a surface notched
specimen
8 Post-tested sectioning procedure to identify
micro-structure at fatigue crack in a through-
thickness notched specimen
9 Post test sectioning of a surface notched specimen
10 Measurement of s in an SM surface notched specimen
11 Definition of h and 2h in double and single sided
welds
A.1 Examples of weld positional (WP) notch locations
A.2 Examples of specific microstructure notch locations
B.1 HAZ adjacent to columnar weld metal for idealized
notch line on macrosection
B.2 Microstructural map of HAZ adjacent to columnar weld
metal
C.1 Post-test microstructural map at the crack tip of a
specimen notched into the HAZ in a carbon manganese
steel
D.1 Alternative local compression treatments
E.1 Measurement
E.2 Post-test sectioning procedure for identifying fracture
initiation microstructure in a through-thickness
notched specimen
E.3 Post-test sectioning procedure for identifying
fracture initiation microstructure in a surface
notched specimen
E.4 Measurement of d1 (along crack front) and d2 (not
along crack front) microstructure in section taken
from through-thickness notched specimens (slice B
in figure E2)
E.5 Measurement of microstructure d1 and apop in section
taken from a surface notched specimen, see figure E.3
(example given for HAZ)
List of references
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