The Effect of the Heat Treatment Condition of the Base Material on the Microstructure and Mechanical Properties of 17-4PH Stainless Steel Electron Beam Welded Joints

• Autorzy: Nalborczyk-Kazanecka Agnieszka , Mrówka-Nowotnik Grażyna , Pytel A.

Identyfikatory

DOI

10.24425/amm.2023.146216

• Języki publikacji: EN

Abstrakty

EN

The study was intended to determine the effect of the input condition of the 17-4PH steel on the microstructure, mechanical properties and stress state of welded joints. The steel adopted for testing was in the solution condition at 1040°C, the aged condition at 550°C/4h and the overaged condition at 760°C/2 h + 620°C/4 h. Samples of 17-4PH steel, after heat treatment processed with different parameters, were electron beam welded (EBW). The microscopic observation (LM, SEM/EDS) showed that the microstructure of the weld consisted of martensite with a δ-ferrite lattice. In the heat-affected zone (HAZ), transformed martensite was found with evidence of niobium carbides. The results of hardness testing revealed the different nature of the hardness profile with the condition the material before the EB welding process. The hardness profile of the HAZ of the welded samples in the as-solution (ES2) and overaged (ES12) condition was varied (from about 340 HV to 450 HV). However, in the aged condition specimen of 17-4PH steel (ES22) showed a similar hardness level, at around 370 HV. The solution condition (ES2) had the highest strength properties R_m 1180.6 MPa with the lowest elongation A 7.6% of all samples tested. The aged welded specimen (ES22) retained high strength R_m 1103.4 MPa with a better relative elongation A 10.1%, whereas the overaged welded specimen (ES12) saw a reduction of strength R_m 950.4 MPa with an improvement in plastic properties A 18.8%. Obtained results showed a significant effect of the input steel condition on the obtained EB welded joints.

Słowa kluczowe

EN

welding; 17-4PH; heat treatment; EB welding

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2023
• Tom: Vol. 68, iss. 4
• Strony: 1503--1512
• Opis fizyczny: Bibliogr. 20 poz., fot., rys., tab.

Twórcy

autor

Nalborczyk-Kazanecka Agnieszka

• Rzeszów University of Technology, Faculty of Mechanical Engineering and Aeronautics, 12 Powstańców Warszawy Av., 35-959 Rzeszów, Poland
• Pratt & Whitney Rzeszów, Rzeszów, Poland

• https://orcid.org/0000-0003-0514-6888

autor

Mrówka-Nowotnik Grażyna

• Rzeszów University of Technology, Faculty of Mechanical Engineering and Aeronautics, 12 Powstańców Warszawy Av., 35-959 Rzeszów, Poland

• https://orcid.org/0000-0002-1594-2610

autor

Pytel A.

• Rzeszów University of Technology, Faculty of Mechanical Engineering and Aeronautics, 12 Powstańców Warszawy Av., 35-959 Rzeszów, Poland
• Pratt & Whitney Rzeszów, Rzeszów, Poland

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025)