Fig. 8 Solder shock test coupons. (a) Showing interconnect defect. (b) Showing strong interconnect bond after multiple solder shock exposure. Courtesy of Shipley Co. More

Fig. 10 Alloy 800 test coupons with a 0.254 mm (0.01 in.) diam grain size exposed to a coal-gasifier environment for 100 h. (a) and (c) Tested at 650 °C (1200 °F) and oxygen and sulfur partial pressures of 3 × 10 −24 atm and 1 × 10 −8 atm, respectively. (b) and (d) Tested at 650 °C (1200 °F More

Fig. 11 Sulfidation attack of alloy 800 test coupons exposed to a coal-gasifier environment ( p O 2 = 3 × 10 −20 atm and p S 2 = 1 × 10 −7 atm) at 870 °C (1600 °F) for 100 h. (a) and (b) Macrograph and micrograph, respectively, of a test coupon with a 0.254 mm More

Fig. 20 Example of tensile-shear test coupon. Source: AWS D8.9F More

Fig. 21 Example of coach peel test coupon More

Fig. 22 Example of pushoff test coupon on a projection weld nut. The bottom support has been cut away to show nut placement. The test measures the peak load to weld failure. Courtesy of Edison Welding Institute More

Fig. 18 Test coupon recommended by American Foundrymen's Society Committee 12K for rapid examination of ductile iron microstructures. Dimensions are given in inches. More

Fig. 55 Lap shear test coupon. Dimensions given in millimeters More

Fig. 12 Macrograph (a) of an alloy 800 test coupon with a 0.254 mm (0.01 in.) diam grain size exposed to a coal-gasifier environment ( p O 2 = 3 × 10 −19 atm and p S 2 = 1 × 10 −7 atm) at 870 °C (1600 °F) for 100 h. ∼1.5×. Micrographs (b) and (c) show cross More

Fig. 11 Microfissure corrosion on IN-135 weld metal on an alloy 904L test coupon after bleach plant exposure. See also Fig. 12 . Source: Ref 5 More

Fig. 12 Section from the bleach plant test coupon in Fig. 11 showing crevice corrosion that has almost obliterated evidence of a microfissure. This form of attack is often mistakenly interpreted as self-initiating pitting; more often, crevice corrosion originates at a microfissure. Etched More

Fig. 22 UNS A93003 aluminum coupons after galvanic corrosion test and removal of corrosion products. (a) Coupled to stainless steel cathode with natural microbial biofilm. (b) Coupled to control stainless steel cathode without biofilm. (c) As originally prepared prior to immersion. Source More

Fig. 8 Variation in thickness of hand-sprayed alumina and zirconia coatings on steel test coupons. Coatings flame sprayed from rod. (a) Alumina on steel, 20 tests. (b) Zirconia on steel, 30 tests More

Fig. 18 Hardness distribution for steels for hot-wound helical springs. Alloy steels were oil quenched from 845 °C (1550 °F); 1095 was oil quenched from 885 °C (1625 °F). Data were obtained from hot-rolled, heat-treated laboratory test coupons, 305 mm (12 in.) long. Specimens were sectioned More

Fig. 15 Schematic diagram of the spinnability test. The thickness of the test coupon is reduced as the roller is advanced; the reduction in thickness at the point of fracture is taken as the maximum spinning reduction per pass. Source: Ref 6 More

Fig. 6 Schematic of typical crevice corrosion test assembly used for titanium alloy sheet and plate samples. E, assembly and plates; M, alloy test coupons; T, PTFE sheet spacers; B, titanium bolt/nut More

Fig. 16 Effect of abrasive cleaning and acid etching on fusion-bonded AS4-APC-2 laminates. Test coupons were joined by ultrasonic welding. Source: Ref 15 More

Fig. 18 Pitting corrosion associated with stainless steel wire brush cleaning on the back of a type 316L stainless steel test coupon after bleach plant exposure. Source: Ref 5 More

Fig. 19 (a) Diagram of fuselage bulkhead crown fitting showing directions of principal stress, locations of test coupons, and macroetch sections. (b) Forging procedure for obtaining desirable circumferential and radial grain flow More

Fig. 15 Revised conventional wing fold hinge rib forging, with straight parting line corresponding to the central plane of the web. The revised design served to distribute draft between upper and lower dies (compare views in sections A-A). Locations of 12 test coupons are indicated by boldface More