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Effects of austempering time on the microstructure and properties of austempered ductile iron
Metallurgical Research & Technology, 2022The effects of austempering time on the structure and properties of high-strength austempered ductile iron were studied by using optical microscopy (OM), X-ray diffractometer (XRD) and scanning electron microscope (SEM). The results show that the matrix structure of austempered ductile iron (ADI) consists of acicular ferrite and retained austenite ...
Zhiwen Shi +5 more
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Austempering kinetics of Cu-Ni alloyed austempered Ductile Iron
Metals and Materials International, 2014The aim of the paper was to investigate the effect of austempering parameters (time and temperature) on the microstructure and mechanical properties of ADI alloyed with 1.5% Cu and 1.6% Ni (in wt.%) in order to establish the optimal processing window.
Erić-Cekić, Olivera +3 more
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Effect of austempering temperature on microstructure of ausferrite in austempered ductile iron
Materials Science and Technology, 2019The effect of austempering temperature on the microstructure of ausferrite in austempered ductile iron was investigated. The results show that the grain sizes of retained austenite and acicular bainitic ferrite both become larger with the increase of austempering temperature.
Chengduo Wang +6 more
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Dependence of fracture toughness of austempered ductile iron on austempering temperature
Metallurgical and Materials Transactions A, 1998Ductile cast iron samples were austenitized at 927 °C and subsequently austempered for 30 minutes, 1 hour, and 2 hours at 260 °C, 288 °C, 316 °C, 343 °C, 371 °C, and 399 °C. These were subjected to a plane strain fracture toughness test. Fracture toughness was found to initially increase with austempering temperature, reach a maximum, and then decrease
P. Prasad Rao, Susil K. Putatunda
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Microstructure evolution of carbidic austempered ductile iron at different austempering temperatures
Journal of Materials Science, 2020This work aims to elucidate the microstructure characteristics of each phase in carbidic austempered ductile iron and the nucleation and growth of acicular ferrite in an austempering temperature range of 250–450 °C. The research results showed that the carbides (Fe, Cr)3C obtained by the eutectic reaction had high indentation hardness and indentation ...
Yang, Penghui +7 more
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Influence of stepped austempering process on the fracture toughness of austempered ductile iron
Metallurgical and Materials Transactions A, 2001This research studied the effect of a two-step austempering process on the fracture toughness of ductile iron and compared it to that of the conventional upper- and lower-ausferrite austempered ductile irons (ADIs). The results showed that such a two-step austempering heat-treatment process yielded a fracture-toughness value equivalent to that of the ...
Cheng-Hsun Hsu, Tao-Liang Chuang
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Wear, 2020
Abstract The tribological behavior of austempered ductile iron (ADI) obtained at different austempering temperatures is investigated. The microstructure of ADI is consisted of spheroidal graphite, retained austenite and acicular ferrite. The volume fraction of retained austenite and the thickness of acicular ferrite increase with increasing ...
Yuzhou Du +5 more
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Abstract The tribological behavior of austempered ductile iron (ADI) obtained at different austempering temperatures is investigated. The microstructure of ADI is consisted of spheroidal graphite, retained austenite and acicular ferrite. The volume fraction of retained austenite and the thickness of acicular ferrite increase with increasing ...
Yuzhou Du +5 more
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Austempering and Austempered Ductile Iron Microstructure in Copper Alloyed Ductile Iron
Journal of Materials Engineering and Performance, 2003The variation in the austempered microstructure, the volume fraction of retained austenite, Xλ, the average carbon content of retained austenite, Cλ, their product XλCλ and the size of bainitic ferrite needles with austempering temperature for 0.6% Cu alloyed ductile iron have been investigated for three austempering temperatures of 270, 330, and 380 ...
Uma Batra, S. Ray, S. R. Prabhakar
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Study of Austempered Ductile Iron (ADI) on Varying Austempering Temperatures
2018Austempered ductile iron (ADI) proven itself as a significant manufacturing material due to its remarkable properties like withstanding high fatigue behavior, fracture toughness, wear resistance, ductility, etc. This paper reports the experimental results obtained on subjecting ADI specimens to thermal treatment, i.e., austempering and austenitization.
Gurmeet Singh +2 more
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The effects of austempering temperature and time onto the machinability of austempered ductile iron
Materials Science and Engineering: A, 2005Abstract Heat treating the ductile cast iron produced austempered ductile iron (ADI), which has outstanding mechanical properties that can be varied over a wide range by varying the heat treatment parameters. In the present work a series of test were conducted and the effects of austempering temperature and times onto the material properties was ...
Isik, YAHYA +3 more
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