On the correlation between microstructural parameters and the thermo-mechanical fatigue performance of cast iron

被引：17

作者：

Kihlberg, E. ^{[1
]}

Norman, V ^{[1
]}

Skoglund, P. ^{[1
,2
]}

Schmidt, P. ^{[3
]}

Moverare, J. ^{[1
]}

机构：

[1] Linkoping Univ, Dept Management & Engn, Div Engn Mat, SE-58183 Linkoping, Sweden

[2] Scania CV AB, Mat Technol, Sodertalje, Sweden

[3] Volvo Grp Trucks Technol, Gothenburg, Sweden

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2021年 / 145卷

关键词：

Cast iron; Thermo-mechanical fatigue; Graphite morphology; Microhardness; Microstructure; THERMAL-CONDUCTIVITY; COMPACTED GRAPHITE; MORPHOLOGY; STRENGTH;

D O I：

10.1016/j.ijfatigue.2020.106112

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Strain-controlled out-of-phase thermo-mechanical fatigue tests at 100-500 degrees C and various strain ranges were conducted on five cast iron grades, including one lamellar, three compacted and one spheroidal graphite iron. Investigations of graphite morphology and matrix characteristics were performed to associate parameters, such as geometrical features of graphite inclusions and the matrix microhardness, to the thermo-mechanical fatigue performance of each grade. From this, thermo-mechanical fatigue life as a function of maximum stress at halflife, is found to decrease consistently with increasing average graphite inclusion length irrespective of the graphite content. In contrast, no evident correlation between the fatigue life and the matrix microhardness is observed.

引用

页数：10

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