Metallurgy 》 盒 HAO TO Conclusion: AM alloys have a complex thermal history involving directional heat extraction,and repeated melting and rapid solidification. Typically,AM fabricated alloys also experience repeated solid state phase transformations.These factors introduce complexities not typically found in conventional processes. MT333 Materials Applications Practice Prof.XiaoQi Chen B.17 Mechanical Properties 1.Tensile strengths: AO TONG The tensile properties of IN718 in as-deposited and heat treated state at room temperature are presented.For comparison,the tensile properties of the wrought IN718 are also included. (ultimate strength(UTS)and yield strength(o 0.2))of the SLMed samples are inferior to those of the typical wrought IN718 alloy though their ductility is much higher. After heat treatment,the tensile strengths and ductility of the SLM+ HTed IN718 at room temperature are comparative with those of the wrought IN718.Therefore,the tensile properties of the SLM Hted IN718 are excellent enough to meet the needs of applications. Tesietestrsuts forN718ttes. Sample state 2(MPa) UTS(MPa) L阁 E(GPa) Temperature SLMed 89-907 1137-1148 19.2-259 204 RT SLMed+HΠed 102-1161 1280-1358 10-2 201 T Wrought IN718(AMS)[23] 1030-1167 1275-140 12-21 208 RT MT333 Materials Applications&Practice Prof.XiaoQi Chen B.18MT333 Materials Applications B.17 & Practice Prof. XiaoQi Chen Conclusion: AM alloys have a complex thermal history involving directional heat extraction, and repeated melting and rapid solidification. Typically, AM fabricated alloys also experience repeated solid state phase transformations. These factors introduce complexities not typically found in conventional processes. Metallurgy MT333 Materials Applications B.18 & Practice Prof. XiaoQi Chen Mechanical Properties 1.Tensile strengths: • The tensile properties of IN718 in as-deposited and heat treated state at room temperature are presented. For comparison, the tensile properties of the wrought IN718 are also included. • (ultimate strength (UTS) and yield strength (σ 0.2)) of the SLMed samples are inferior to those of the typical wrought IN718 alloy though their ductility is much higher. • After heat treatment, the tensile strengths and ductility of the SLM + HTed IN718 at room temperature are comparative with those of the wrought IN718. Therefore, the tensile properties of the SLM + Hted IN718 are excellent enough to meet the needs of applications