Biaxial deformation behavior of friction stir processed TRIP steel sheets

ÖZTÜRK YILMAZ, İmren; YILMAZ, MÜMİN; saray, onur

doi:10.26701/ems.570940

Biaxial deformation behavior of friction stir processed TRIP steel sheets

İmren ÖZTÜRK YILMAZ, (Bursa Teknik Üniversitesi, Mimarlık ve Mühendislik Fakültesi, Makine Mühendisliği Bölümü, Bursa, Türkiye)

Onur SARAY, (Bursa Teknik Üniversitesi, Mimarlık ve Mühendislik Fakültesi, Makine Mühendisliği Bölümü, Bursa, Türkiye)

Mümin YILMAZ (Bursa Teknik Üniversitesi, Mimarlık ve Mühendislik Fakültesi, Makine Mühendisliği Bölümü, Bursa, Türkiye)

European Mechanical Science

2 0

Yıl: 2019 Cilt: 3 Sayı: 2 Sayfa Aralığı: 56 - 61 Metin Dili: İngilizce DOI: 10.26701/ems.570940 İndeks Tarihi: 27-05-2020

Biaxial deformation behavior of friction stir processed TRIP steel sheets

Öz:

In this study, effects of Friction Stir Processing (FSP) on the biaxial deformation behavior of 1.95 mm thick TRIP780 steel sheets were investigated. FSP induced large plastic shear strains imposed at elevated temperature ofabout 945°C have drastically changed both microstructure and flow behavior of the steel. For these reason, afterthe FSP, significant changes in the microstructural and mechanical properties were obtained. After FSP, initialmicrostructure of the TRIP-steel transformed into a microstructure that mainly dominated by martensite grains.This transformation resulted with nearly two-fold hardness increase in stir zone. Similarly, lath martensitedominated microstructure elevated the FSPed condition into an ultra-high strength level with expense of roomtemperature ductility. After FSP, yield strength and UTS increased from 415MPa and 829 MPa to about 1280MPa and 1475 MPa. Uniform elongation and elongation to failure decreased from 23% and 11% to 34% and 22%respectively. In accordance to decreased ductility, Erichsen index (EI) of the steel decreased from 9.16 mm to4.90 mm under biaxial stretching conditions In contrast to strength enhancement punch force at EI of TRIP-780also decreased from 80.6 kN to 45.4 kN respectively. This simultaneous decrease in both Ei and FEi attributed to increase in cracking tendency of the FSP induced microstructure.

Anahtar Kelime:

Konular: Mühendislik, Makine

Belge Türü: Makale Makale Türü: Araştırma Makalesi Erişim Türü: Erişime Açık

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APA	ÖZTÜRK YILMAZ İ, saray o, YILMAZ M (2019). Biaxial deformation behavior of friction stir processed TRIP steel sheets. , 56 - 61. 10.26701/ems.570940
Chicago	ÖZTÜRK YILMAZ İmren,saray onur,YILMAZ MÜMİN Biaxial deformation behavior of friction stir processed TRIP steel sheets. (2019): 56 - 61. 10.26701/ems.570940
MLA	ÖZTÜRK YILMAZ İmren,saray onur,YILMAZ MÜMİN Biaxial deformation behavior of friction stir processed TRIP steel sheets. , 2019, ss.56 - 61. 10.26701/ems.570940
AMA	ÖZTÜRK YILMAZ İ,saray o,YILMAZ M Biaxial deformation behavior of friction stir processed TRIP steel sheets. . 2019; 56 - 61. 10.26701/ems.570940
Vancouver	ÖZTÜRK YILMAZ İ,saray o,YILMAZ M Biaxial deformation behavior of friction stir processed TRIP steel sheets. . 2019; 56 - 61. 10.26701/ems.570940
IEEE	ÖZTÜRK YILMAZ İ,saray o,YILMAZ M "Biaxial deformation behavior of friction stir processed TRIP steel sheets." , ss.56 - 61, 2019. 10.26701/ems.570940
ISNAD	ÖZTÜRK YILMAZ, İmren vd. "Biaxial deformation behavior of friction stir processed TRIP steel sheets". (2019), 56-61. https://doi.org/10.26701/ems.570940

APA	ÖZTÜRK YILMAZ İ, saray o, YILMAZ M (2019). Biaxial deformation behavior of friction stir processed TRIP steel sheets. European Mechanical Science, 3(2), 56 - 61. 10.26701/ems.570940
Chicago	ÖZTÜRK YILMAZ İmren,saray onur,YILMAZ MÜMİN Biaxial deformation behavior of friction stir processed TRIP steel sheets. European Mechanical Science 3, no.2 (2019): 56 - 61. 10.26701/ems.570940
MLA	ÖZTÜRK YILMAZ İmren,saray onur,YILMAZ MÜMİN Biaxial deformation behavior of friction stir processed TRIP steel sheets. European Mechanical Science, vol.3, no.2, 2019, ss.56 - 61. 10.26701/ems.570940
AMA	ÖZTÜRK YILMAZ İ,saray o,YILMAZ M Biaxial deformation behavior of friction stir processed TRIP steel sheets. European Mechanical Science. 2019; 3(2): 56 - 61. 10.26701/ems.570940
Vancouver	ÖZTÜRK YILMAZ İ,saray o,YILMAZ M Biaxial deformation behavior of friction stir processed TRIP steel sheets. European Mechanical Science. 2019; 3(2): 56 - 61. 10.26701/ems.570940
IEEE	ÖZTÜRK YILMAZ İ,saray o,YILMAZ M "Biaxial deformation behavior of friction stir processed TRIP steel sheets." European Mechanical Science, 3, ss.56 - 61, 2019. 10.26701/ems.570940
ISNAD	ÖZTÜRK YILMAZ, İmren vd. "Biaxial deformation behavior of friction stir processed TRIP steel sheets". European Mechanical Science 3/2 (2019), 56-61. https://doi.org/10.26701/ems.570940