Non-destructive testing method for crack defects, and a testing standard part and a manufacturing method thereof

A manufacturing method of a crack defect standard part, used for the non-destructive testing of crack defects of an additive manufacturing workpiece, comprises:

• step A, setting a crack defect area of the standard part, wherein a proportion of the crack defects in the crack defect area is set as a first proportion value;
• step B, selecting an additive manufacturing forming process for manufacturing the crack defect area to obtain first process parameters of the additive manufacturing forming process corresponding to the first proportion value;
• and
• step C, performing the additive manufacturing forming process based on the first process parameters to form the crack defect area,
• wherein, the additive manufacturing forming process is a laser selective melting forming process, the material in the crack defect area is Hastelloy X alloy, the first proportion value is 0.07%-1.2%, the first process parameters comprise:
• a first laser linear energy density of computed from the first proportion value by a following formula, a first scanning spacing of 0.07 mm-0.09 mm, a first strip width of 3 mm-10 mm, a first strip overlap of 0.05 mm-0.1 mm, and a first paving powder thickness of 0.02 mm-0.03 mm;
• the first laser linear energy density is determined by the following formula:
• a=1.3−1.4/(1+(η/291)8)
• wherein a is the first proportion value, and η is the first laser linear energy density.