The Effects of Grain Boundary Structures on Mechanical Properties in Nanocrystalline Al Alloy

• Autorzy: Jang Jin Man , Lee Wonsik , Ko Se-Hyun

Identyfikatory

DOI

10.24425/amm.2021.136408

• Języki publikacji: EN

Abstrakty

EN

This study investigates the effects of grain boundary structures on mechanical properties of nanocrystalline Al-0.7Mg-1.0Cu alloy using nanoindentation system. Grain boundary structure transforms to high angle grain boundaries from low angle ones with increase of heat treatment temperature and the transformation temperature is about 400°C. Young’s modulus and hardness are higher in sample with low angle grain boundaries, while creep length is larger in sample with high angle ones. These results indicate that progress of plastic deformation at room temperature is more difficult in sample with low angle ones. During compression test at 200°C, strain softening occurs in all samples. However, yield strength in sample with low angle grain boundaries is higher twice than that with high angle ones due to higher activation energy for grain boundary sliding.

Słowa kluczowe

EN

nanocrystalline Al alloy; Young's modulus; hardness; nanoindentation; low and high angle grain boundary

• 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: 2021
• Tom: Vol. 66, iss. 4
• Strony: 971--975
• Opis fizyczny: Bibliogr. 26 poz., fot., rys., tab.

Twórcy

autor

Jang Jin Man

• Korea Institute of Industrial Technology: Incheon, 21999 Republic of Korea
• Inha University, Department of Materials Science and Engineering, Incheon, 22212, Republic of Korea

• https://orcid.org/0000-0002-0574-2711

autor

Lee Wonsik

• Korea Institute of Industrial Technology: Incheon, 21999 Republic of Korea

• https://orcid.org/0000-0003-1358-4300

autor

Ko Se-Hyun

• Korea Institute of Industrial Technology: Incheon, 21999 Republic of Korea

• https://orcid.org/0000-0001-9886-9078

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Uwagi

1. This study has been conducted with the support of the Korea Institute of Industrial Technology as “Development of root technology for multi-product flexible production (KITECH EO-20-0015)”

2. Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).