Page 35 - Welding of Aluminium and its Alloys
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Welding metallurgy    27

















































                   2.12 Solidification cracking: (a) in the finish crater of a TIG weld in
                   A5083 alloy; (b) in a 3mm thick A6082 plate/4043 filler metal TIG weld.
                   Courtesy of TWI Ltd.
            determined what is termed the hot short range, the range of composition
            within which the alloy has a high risk of hot cracking. The hot short range
            of the common alloying elements is given in Table 2.4.
              These results are produced by performing standard cracking tests. These
            tests are designed to load the weld transversely under controlled conditions
            to give cracks, the length of which will be a measure of the crack sensitiv-
            ity of the specific alloy being tested. This enables the alloys to be ranked in
            order of sensitivity and characteristics such as the hot short range to be
            determined.
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