The purpose of this research is to study the influence processing conditions that affect final behaviour specimens made from a 17-4PH composition powder without necessary thermal treatment be considered 17-4PH, which manufactured using additive technique known as plasma metal deposition (PMD). To end, two walls prealloyed were built under distinct atmospheric conditions, i.e., air and argon, wi...

17-4PH stainless steel is a martensitic precipitation hardening stainless steel that provides an outstanding combination of high strength, good corrosion resistance, good mechanical properties, good toughness in both base metal and welds, and short time, low-temperature heat treatments that minimize warpage and scaling. This valuable alloy is widely used in the aerospace, nuclear, chemical, pet...

17-4PH martensitic steel is usually used as valve stems in nuclear power plants and it suffers from thermal aging embrittlement due to long-time service a high-temperature high-pressure environment. Here, we characterized the evolution of microstructures at nano-scale by situ small-angle neutron scattering (SANS) with thermo-mechanically coupled loading device. The device could set different te...

the 17-4ph alloy is a martensitic stainless steel with 3–5 wt% cu, strengthened by the precipitation hardening. due to excellent mechanical properties, corrosion resistance and ease of heat treatment, this alloy has unique applications in nuclear power plants and marine constructions. in this paper, the influence of ageing heat treatment, solution annealing followed by ageing at 480, 550 and 62...