In this paper, the high temperature deformation behaviour of 17-4PH steel was studied. A new forming optimization method proposed. The study will help guide obtainment high-precision and high-mechanical properties forging products in aerospace industry. hot compression test carried out on a Gleeble1500D machine (DUFFERS SCIENTFIC, Beijing, China). stress–strain at 1000 °C~1150 °C strain rate 0....

The impeller under consideration is a rotor wheel of centrifugal compressor, made 17-4PH martensitic precipitated hardening stainless steel. Its total operating lifetime was estimated to 80,000 h, but it fractured beforehand, 4 days after the scheduled overhaul without any observed pre-symptoms. important causes failure were its working conditions: moist H2S environment, applied shaft fitting s...

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 susceptibili...

Chitosan (CT) is an antibacterial polysaccharide that has been investigated for drug carriers, haemostats and wound dressings. For these applications, customised CT devices can often be obtained with specific experimental conditions, which can irreversibly alter native biopolymer properties and functions and lead to unreliable material behaviour. In order to investigate the structure-function r...

The performance of wrought and post-build heat treated, additively manufactured SS17-4PH stainless steel was evaluated to determine whether additive processing can produce material with a similar corrosion resistance the alloy in form, establish manufacturing (AM) conditions alter electrochemical required for attack. Samples built by laser powder bed fusion (LPBF) from nitrogen-atomized argon-a...

Hydrogen-induced ductility loss in two precipitation-hardened, martensitic stainless steels was investigated via tensile testing with internal hydrogen, revealing it to be more significant a higher hydrogen content or strength. A lower and strength resulted quasi-cleavage fracture considerable plastic strain, suggesting that hydrogen–dislocation interaction contributed the ductility. When eithe...