High-Cycle Fatigue of Austempered Ductile Irons in Various-Sized Y-Block Castings
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- Lin Chih-Kuang
- Department of Mechanical Engineering, National Central University
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- Wei Jing-Yuan
- Department of Mechanical Engineering, National Central University
Bibliographic Information
- Other Title
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- High-Cycle Fatigue of Austempered Ducti
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Abstract
High-cycle fatigue (HCF) properties of a number of different grades of austempered ductile irons (ADIs) were investigated. Ductile irons were prepared as Y-block castings with three section sizes (25, 50, and 100 mm in thickness). Fatigue specimens were selected from various locations within the castings, austenitized at 1173 K, and then austempered at 573 and 633 K, respectively. HCF tests were conducted by rotary bending method to generate the S–N curves and the associated fatigue limits. As section size increased, the HCF strength of ADI was decreased and affected by the inferior graphite nodule morphology and microshrinkage porosity resulting from the slower solidification rate. The effects of section size, location within the heavy-section casting, and austempering temperatures on the HCF strength of ADI are interpreted in terms of the graphite nodule morphology and microshrinkage pores. An empirical equation was introduced to correlate the fatigue limit of ADI with the impact toughness value and mean nodule diameter.
Journal
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- Materials Transactions, JIM
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Materials Transactions, JIM 38 (8), 682-691, 1997
The Japan Institute of Metals
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Keywords
Details 詳細情報について
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- CRID
- 1390001204248490368
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- NII Article ID
- 130003556960
- 10002453375
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- NII Book ID
- AA10699969
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- COI
- 1:CAS:528:DyaK2sXmsFegsrs%3D
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- ISSN
- 2432471X
- 09161821
- http://id.crossref.org/issn/13459678
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- NDL BIB ID
- 4295843
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed