TY - JOUR
T1 - Nodule Count Effect On Microstructure And Mechanical Properties Of Hypo-Eutectic Adi Alloyed With Nickel
AU - Colin-García, E.
AU - Cruz-Ramírez, A.
AU - Romero-Serrano, J. A.
AU - Sánchez-Alvarado, R. G.
AU - Gutiérrez-Pérez, V. H.
AU - Reyes-Castellanos, G.
N1 - Publisher Copyright:
© 2021. Journal of Mining and Metallurgy, Section B: Metallurgy. All Rights Reserved.
PY - 2021
Y1 - 2021
N2 - Samples of ductile iron alloyed with 0.88 % Ni with a nodule count of 606, 523, and 290 nod/mm2 were obtained from sand cast plates of different thickness in the range from 8.46 to 25.4 mm. The effect of the nodule count was evaluated during the austempering process held at 285 °C and austempering times of 15, 30, 45, 60, 70, and 90 min. The volume fraction of high carbon austenite increased when the nodule count increased, however, the carbon content of the high carbon austenite kept almost constant. The process window was narrow, requiring a lower austempering time when the nodule count increased. The combination of a higher nodule count and low austempering temperature allowed obtaining a fine ausferritic microstructure which led to higher Brinell hardness and tensile strength. The process window was determined by XRD measurements and it was in good agreement with the microstructural and hardness evolution as the austempering time increased.
AB - Samples of ductile iron alloyed with 0.88 % Ni with a nodule count of 606, 523, and 290 nod/mm2 were obtained from sand cast plates of different thickness in the range from 8.46 to 25.4 mm. The effect of the nodule count was evaluated during the austempering process held at 285 °C and austempering times of 15, 30, 45, 60, 70, and 90 min. The volume fraction of high carbon austenite increased when the nodule count increased, however, the carbon content of the high carbon austenite kept almost constant. The process window was narrow, requiring a lower austempering time when the nodule count increased. The combination of a higher nodule count and low austempering temperature allowed obtaining a fine ausferritic microstructure which led to higher Brinell hardness and tensile strength. The process window was determined by XRD measurements and it was in good agreement with the microstructural and hardness evolution as the austempering time increased.
KW - ADI
KW - Ductile iron
KW - Nickel
KW - Nodule count
KW - Process window
UR - http://www.scopus.com/inward/record.url?scp=85101323732&partnerID=8YFLogxK
U2 - 10.2298/JMMB200403009C
DO - 10.2298/JMMB200403009C
M3 - Artículo
AN - SCOPUS:85101323732
SN - 1450-5339
VL - 57
SP - 115
EP - 124
JO - Journal of Mining and Metallurgy, Section B: Metallurgy
JF - Journal of Mining and Metallurgy, Section B: Metallurgy
IS - 1
ER -