Heat Treatment Effects on Pristine and Cold-Worked Thin-Walled Inconel 625

Metals

Gregory Jerman¹  Annette Gray¹  William Tilson¹  Skylar Elliott¹  Gabriel Demeneghi¹  Ayman Girgis¹  Ellen Rabenberg¹ 

[1] NASA Marshall Space Flight Center, 4602 Martin Rd SW, Huntsville, AL 35808, USA;

关键词: Inconel;    thin wall;    tensile;    microhardness;    microstructure;    heat treatment;   

DOI  :  10.3390/met11111746

来源: DOAJ

【 摘 要 】

Thin-walled Inconel 625 sheet metal was sectioned into tensile specimens, plastically strained, and then heat treated. Specimens were pulled to a targeted strain, unloaded, and then subjected to one of two heat treatments with the goal of restoring the full ductility and total plastic strain capability of the material. Post-heat treatment tensile testing was performed at room temperature to evaluate the heat treatment efficacy and then followed by hardness and microstructural analysis. The results showed the amount of material recovery was affected by the initial amount of plastic strain imparted to the tensile specimen before heat treatment. Although recrystallization was not observed, grains did elongate in the load direction, and the Kernel average misorientation (KAM) increased with heat treatment. Furthermore, specimens prestrained to 40% and heat treated at 980 °C successfully recovered 88% of pre-heat treatment strain capability prior to fracturing.

【 授权许可】

Unknown