Microstructure characterization of welds in X5CrNiCuNb16-4 steel in overaged condition

• Autorzy: Ziewiec A. , Zielińska-Lipiec A. , Kowalska J. , Ziewiec K.

Identyfikatory

DOI

10.2478/adms-2019-0005

• Języki publikacji: EN

Abstrakty

EN

The paper presents the results of the investigation of microstructure of the welded X5CrNiCuNb16-4 (17-4PH) steel after solution treatment and aging at 620°C for different periods. The microstructure and the phase composition of the steel was investigated using light microscopy (LM), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), transmission electron microscopy (TEM) and the X-ray diffraction (XRD). Hardness was measured for samples aged at different times. Density distributions of Cu precipitates were established. The investigation has shown that the microstructure of the X5CrNiCuNb16-4 steel welds after aging at 620 ° C consists of tempered martensite, fine Cu precipitates and austenite. It was observed that the size of the Cu precipitates increases with increasing the aging time, what affects the decrease of hardness. Simultaneously, the quantity of reversed austenite increases with increase of aging time. It was revealed that enrichment of the austenite in Ni, Cu and C affects the increase of Ms, but this factor does not determine the stability of austenite.

Słowa kluczowe

EN

welds; 17-4PH steel; reverse austenite; martensitic PH stainless steels; aging

PL

spoiny; stal; 17-4PH; starzenie się; austenit nawrotu; nierdzewna stal martenzytyczna

• Wydawca: Politechnika Gdańska
• Czasopismo: Advances in Materials Science
• Rocznik: 2019
• Tom: Vol. 19, nr 1(59)
• Strony: 57--69
• Opis fizyczny: Bibliogr. 34 poz., wykr., tab., rys.

Twórcy

autor

Ziewiec A.

• AGH University of Science and Technology in Krakow, Faculty of Metals Engineering and Industrial Computer Science, al. Mickiewicza 30, 30-059 Krakow, Poland

autor

Zielińska-Lipiec A.

• AGH University of Science and Technology in Krakow, Faculty of Metals Engineering and Industrial Computer Science, al. Mickiewicza 30, 30-059 Krakow, Poland

autor

Kowalska J.

• AGH University of Science and Technology in Krakow, Faculty of Metals Engineering and Industrial Computer Science, al. Mickiewicza 30, 30-059 Krakow, Poland

autor

Ziewiec K.

• Pedagogical University of Cracow, Faculty of Mathematics, Physics and Technical Science, Institute of Technology, ul. Podchorążych 2, 30-084 Kraków, Poland

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