Premium
Microstructure and Tensile Properties of Graphite Ductile Iron Improved by Minor Amount of Dual‐Phased TiC–TiB 2 Nanoparticles
Author(s) -
Wang Bingxu,
Qiu Feng,
Cui Weiwei,
Jin Yongping,
Zhang Yu,
Hu Zirui,
Barber Gary. C.
Publication year - 2021
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.202100246
Subject(s) - materials science , cementite , graphite , microstructure , ultimate tensile strength , pearlite , ferrite (magnet) , ductility (earth science) , metallurgy , composite material , ductile iron , nanoparticle , austenite , nanotechnology , creep
Herein, the effects of dual‐phased TiC–TiB 2 nanoparticles on the microstructure and tensile properties of graphite ductile irons are investigated. Aluminum master alloys containing the TiC–TiB 2 nanoparticles are utilized in the production of novel graphite ductile irons. It is found that the graphite nodules become finer with increased nodularity, smaller average diameter, and incremental amount per unit area. The thickness of ferritic and cementite layers in pearlite is reduced and the orientation becomes more regular. More ferrite is produced in the matrix after adding the nanoparticles. In tensile tests, the yield strength, tensile strength, and ductility are simultaneously improved. Also, it is determined that the cleavage and semicleavage fractures are transformed into ductile fractures after engaging the nanoparticles, which could be associated with more dimples and ductile risers being formed to promote the plastic deformation of the graphite ductile irons.