Influence of microstructure on the fatigue properties of austempered ductile irons .1. High-cycle fatigue

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Title:	Influence of microstructure on the fatigue properties of austempered ductile irons .1. High-cycle fatigue
Authors:	Lin,CK;Lai,PK;Shih,TS
Contributors:	機械工程學系
Keywords:	CAST-IRON
Date:	1996
Issue Date:	2010-06-29 18:06:16 (UTC+8)
Publisher:	中央大學
Abstract:	Rotary bending fatigue tests were conducted on a number of different grades of austempered ductile irons (ADIs). These ADIs were produced from four different base-irons with various nodularity, nodule counts, and alloy elements. Each base-iron was austenitized at 900 degrees C and then austempered at 300 and similar to 360 degrees C, respectively, to generate different ADI matrix structures. No simple rule between high-cycle fatigue (HCF) strength and monotonic tensile strength and hardness in ADI was observed, as the HCF strength depended mainly on the toughness and amount of retained austenite. The effects of austempering temperatures, nodularity, nodule count, and retained austenite content on the HCF behavior are discussed. Fractography with scanning electron microscopy (SEM) was conducted to determine the HCF fracture origins and failure mechanisms. Copyright (C) 1996 Elsevier Science Limited
Relation:	INTERNATIONAL JOURNAL OF FATIGUE
Appears in Collections:	[Graduate Institute of Mechanical Engineering] journal & Dissertation

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