Finite Element Modeling of Residual Stress at Joint Interface of Titanium Alloy and 17-4PH Stainless Steel

Residual stress is a crucial element in determining the integrity of parts and lifetime additively manufactured structures. In stainless steel Ti-6Al-4V fabricated joints, residual causes cracking delamination brittle intermetallic joint interface. Knowledge degree at interface is, therefore, important; however, available information limited owing to joint’s nature its high failure susceptibility. this study, distribution during deposition 17-4PH on alloy was predicted using Simufact additive software based finite modeling technique. A sharp gradient revealed interface, with compressive side tensile side. This attributed large difference coefficients thermal expansion two metals. The exhibited maximum equivalent 500 MPa, which twice that (240 MPa). showed good correlation calculations alloys. history via simulation within temperature range 368–477 °C highly congruent obtained actual experiment, approximately 300–450 °C. occurred, ascribable accumulation multiple manufacturing (AM) cycles FeTi Fe2Ti build deflected an angle 0.708° after simulation. study could serve as valid reference for engineers understand development joints AM.