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

被引：11

作者：

Hernando, Juan Carlos ^{[1
]}

Elfsberg, Jessica ^{[2
]}

Ghassemali, Ehsan ^{[1
]}

Dahle, Arne K. ^{[1
]}

Dioszegi, Attila ^{[1
]}

机构：

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

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

来源：

SCRIPTA MATERIALIA | 2019年 / 168卷

基金：

瑞典研究理事会;

关键词：

Coarsening; Dendrites; Mechanical properties; UTS; Compacted graphite iron; MORPHOLOGICAL EVOLUTION; DENDRITIC MICROSTRUCTURES; MECHANICAL-PROPERTIES; CAST; SOLIDIFICATION;

D O I：

10.1016/j.scriptamat.2019.04.010

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

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.

引用

页码：33 / 37

页数：5

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