T.O. 33B-1-13-94though the joint is perfectly sound. Such an indication may be produced in a friction or flash weld oftwo dissimilar metals. (See Figure 3-46)Figure 3-46. Magnetic Particle Indication at the Weld between a Soft and a Hard Steel Rodd. The junction between two ferromagnetic metals by means of non-magnetic bonding materials, as in abrazed joint. An indication will be produced though the joint itself may be perfectly sound. (See Figure3-47)Figure 3-47. Magnetic Particle Indication of the Braze Line of a Brazed Tool Bite. Segregation of the constituents of the metal, where these have different permeabilities, as for example,low carbon areas in a high carbon steel, or areas of ferrite, which is magnetic, in a matrix of stainlesssteel which is austenitic and therefore non-magnetic. Another example would be in the weld zoneand/or the heat-affected zone in welds between details of the same alloy. (See Figure 3-48.)
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