Effects of post-printing heat treatment on the microstructure and mechanical properties of a wire arc additive manufactured 420 martensitic stainless steel part

2021 ◽  
pp. 141167
Author(s):  
Alireza Vahedi Nemani ◽  
Mahya Ghaffari ◽  
Salar Salahi ◽  
Ali Nasiri
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Stainless Steel ◽  
Martensitic Stainless Steel ◽  
Steel Part ◽  
Microstructure And Mechanical Properties ◽  
Stainless Steel Part

scholarly journals Effect of Intercritical Annealing on the Microstructure and Mechanical Properties of 0.1C-13Cr-3Ni Martensitic Stainless Steel

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 392
Author(s):  
Jaka Burja ◽  
Blaž Šuler ◽  
Marko Češnjaj ◽  
Aleš Nagode
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Stainless Steel ◽  
Impact Toughness ◽  
Martensitic Stainless Steel ◽  
Large Deviation ◽  
Intercritical Annealing ◽  
Charpy Impact ◽  
Charpy Impact Toughness ◽  
Microstructure And Mechanical Properties

Standard heat treatment of martensitic stainless steel consists of quenching and tempering. However, this results in high strength and hardness, while Charpy impact toughness shows lower values and a large deviation in its values. Therefore, a modified heat treatment of 0.1C-13Cr-3Ni martensitic stainless steel (PK993/1CH13N3) with intercritical annealing between Ac1 and Ac3 was introduced before tempering to study its effect on the microstructure and mechanical properties (yield strength, tensile strength, hardness and Charpy impact toughness). The temperatures of intercritical annealing were 740, 760, 780 and 800 °C. ThermoCalc was used for thermodynamic calculations. Microstructure characterization was performed on an optical and scanning electron microscope, while XRD was used for the determination of retained austenite. Results show that intercritical annealing improves impact toughness and lowers deviation of its values. This can be attributed to the dissolution of the thin carbide film along prior austenite grain boundaries and prevention of its re-occurrence during tempering. On the other hand, lower carbon concentration in martensite that was quenching from the intercritical region resulted in lower strength and hardness. Intercritical annealing refines the martensitic microstructure creating a lamellar morphology.

scholarly journals Effect of Heat Treatment on the Microstructure and Mechanical Properties of a Welded AISI 410 Martensitic Stainless Steel

IARJSET ◽  
2016 ◽  
Vol 3 (4) ◽  
pp. 6-12 ◽  
Author(s):  
Johnpaul C Ezechidelu ◽  
Samuel O Enibe ◽  
Daniel O Obikwelu ◽  
Paul S Nnamchi ◽  
Camillus S Obayi
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Stainless Steel ◽  
Martensitic Stainless Steel ◽  
Microstructure And Mechanical Properties
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