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Chapter 17: D. Testing Methods 189
metal. It is useful in finding out whether any of the mechanical properties of the
base metal were destroyed by the welding process (Integrated Publishing 2008).
A crash test is usually performed in order to ensure safe design standards in
crash compatibility for automobiles and related components, as shown in Figure
17.10.
Compressive
force
Face
of weld
1/16"
y
L
1/3 L
Scribed
lines
x
Root
Face
of weld
Tested
specimen
Specimen
Preparation
Testing
y – x
× 100 = % Elongation
x
a. b. c.
d.
Part III.D.2
Figure 17.9 Free-bend test.
Figure 17.10 Crash testing.