Page 20 - Handbook of Materials Failure Analysis
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12 CHAPTER 1 Progressive failures of components
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FIGURE 1.7
Optical stereomicrograph of a longitudinal section, perpendicular to the circumferential weld
joint, revealing solid-state welding of dissimilar steel grades (section taken from the tube
sample depicted in Figure 1.2). Note the hardness variation across the joint (Nital 2%
immersion etching) (see also Ref. [20]).
FIGURE 1.8
Optical micrographs showing the different microstructures from both sides of the weld joint.
