The effect of coarsening of primary austenite on the ultimate tensile strength of hypoeutectic compacted graphite Fe-C-Si alloys

SCRIPTA MATERIALIA

卷:168

Article

Hernando, Juan Carlos¹  Elfsberg, Jessica²  Ghassemali, Ehsan¹  Dahle, Arne K.¹  Dioszegi, Attila¹ 

[1] Jonkoping Univ, Sch Engn, Dept Mat & Mfg, POB 1026, SE-55711 Jonkoping, Sweden

[2] Scania CV AB, SE-15187 Sodertalje, Sweden

关键词: Coarsening;    Dendrites;    Mechanical properties;    UTS;    Compacted graphite iron;   

DOI  :  10.1016/j.scriptamat.2019.04.010

来源: Elsevier

【 摘 要 】

The effect of primary austenite morphology on the ultimate tensile strength (IJTS) of hypoeutectic compacted graphite Fe-C-Si alloys (CGI) is studied by isothermal coarsening experiments. Secondary dendrite arm spacing (SDAS) and the morphological characteristics related to the surface area of primary austenite, M-gamma and D-ID(Hyd), increase with the cube root of coarsening time. UTS decreases linearly with increasing coarseness of primary austenite. The eutectic and eutectoid microstructures are unaffected by the primary austenite morphology. These observations demonstrate the strong influence of primary austenite morphology on the mechanical properties of hypoeutectic CGI alloys. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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