BS 7448-2:1997

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

Defines the specimen design, preparation , method for notch placement and post-test validation of the notch placement when applied to specimens prepared from welds (such as specimens testing the weld metal or heat affected zone).