Electropulses induced direct aging and ultrafast precipitation in additive manufactured 15-5 PH stainless steel

Autor:	Binghua Lv, Sheng Cao, Xiaodong Niu, Hong Luo, Boris Straumal, Yuanshen Qi
Jazyk:	angličtina
Rok vydání:	2024
Předmět:	Electropulsing treatment Maraging stainless steel Selective laser melting Precipitation Direct aging Materials of engineering and construction. Mechanics of materials TA401-492
Zdroj:	Materials Research Letters, Vol 12, Iss 7, Pp 507-514 (2024)
Druh dokumentu:	article
ISSN:	21663831 2166-3831
DOI:	10.1080/21663831.2024.2352052
Popis:	Periodic electric current pulses, i.e. electropulses, were applied on selective laser melting prepared 15-5 precipitation hardening stainless steel for direct aging. Traditional aging treatment typically takes hours to achieve peak hardening and could induce reverted austenite. Herein, electropulsing treatment on as-built sample can dramatically reduce the processing time to 6 min. Moreover, the nucleation of reverted austenite triggered by the segregation of Ni atoms on the interfaces between Cu-rich precipitates and martensite was not observed. These two unique phenomena were rationalized to the unsynchronized enhancement of diffusivity of Cu and Ni atoms under electropulses due to their different electron configurations.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/0f344a51471143b3bf753f6b0cfbbf27 Zobrazit plný text záznamu View record in DOAJ