Tensile Properties of a Low-Cost First Generation Single Crystal Superalloy DD16

Abstract

The tensile properties of a low-cost first generation single crystal superalloy DD16 have been investigated. The results show that values of the tensile strength and yield strength of DD16 alloy were similar at typical temperatures; from room temperature to 760, the yield strength of DD16 alloy increases; However, above 760, the yield strength of DD16 alloy decreases remarkably, and the maximum of the yield strength was 1145.5MPa at 760. From room temperature to 760, the fracture mode was cleavage fracture; But above 760, the fracture characteristics changed from cleavage to dimple.

Effect of C content on the microstructures and mechanical properties of laser additive manufactured Ni-base superalloys

“…It is worth noting that the properties of AM samples can even reach the traditional second-generation single crystal superalloy [ [26] , [27] , [28] , [29] , [30] , [31] , [32] ], as shown in the red ball in Fig. 10 , which shows the superiority of additive manufacturing properties.…”

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Fig. 10 Summary of tensile strength vs uniform elongation at 760 °C of second-generation superalloys [ [26] , [27] , [28] , [29] , [30] , [31] , [32] ].

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Influence of carbon additions on microstructures and mechanical properties in additive manufactured superalloys

“…Materials Advances yield behavior of the superalloys is also observed at 760 1C, but the impact of carbon on tensile properties appears to be minimal, as indicated in Table 4. Notably, the performance of the AM samples approaches that of traditional secondgeneration single-crystal superalloys, [27][28][29][30][31][32][33] represented by the yellow sphere in Fig. 10(c), which shows the superiority of AM properties.…”

“…Fig. 11 Engineering stress-strain curves of three alloys with different carbon contents (yield strength YS; elongation UE; tensile strength UTS) (a) 760 1C high temperature tensile; (b) room temperature tensile; and (c) summary of tensile strength vs uniform elongation at 760 1C of second-generation superalloys [29][30][31][32][33][34][35]. …”

Phase constitution, microstructure and mechanical properties of a Ni-based superalloy specially designed for additive manufacturing

“…Ni-based superalloys are widely used to prepare components such as aerospace turbine blades and ground gas-turbine engine blades because they have an exceptional combination performance of high-temperature strength, good toughness, and high resistance to degradation in corrosive or oxidizing environments [1] . However, there are varied shortcomings when manufacturing superalloy components by conventional techniques.…”