Microstructure and Mechanical Properties of As-Cast Ductile Irons Alloyed with Manganese and Copper
IR@CMERI: CSIR- Central Mechanical Engineering Research Institute (CMERI), Durgapur
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| Title |
Microstructure and Mechanical Properties of As-Cast Ductile Irons Alloyed with Manganese and Copper
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| Creator |
Dasgupta, Ranjan Kumar
Mondal, Dipak Kumar Chakrabarti, Ajit Kumar Ganguli, Ashis Chandra |
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| Description |
The present investigation was carried out to study the effect of manganese and copper addition, singly as well as in combination, on the microstructure, micro-segregation, and mechanical properties of ductile irons. Alloy A (3.18C, 2.64Si, 0.45Mn), alloy B (3.35C, 2.51Si, 0.82Mn), alloy C (3.16C, 2.80Si, 1.08Mn, 0.56Cu), and alloy D (3.18C, 3.00Si, 1.04Mn, 1.13Cu) were melted and cast in the form of Y-block test pieces. The cast microstructures varied from ferrito-pearlitic in alloys A, B, and C to pearlitic in alloy D. However, on XRD analysis and SEM examination, the presence of martensite patches was also detected. There was a marginal decrease in nodule count in alloy B. In alloys C and D, nodule counts were higher, but the proportion of ferrite decreased drastically. Alloy D was found to be the strongest (UTS ≈ 800 MPa, El = 5%) with alloys A and C coming next in strength; while alloy B was weakest of the four. The presence of martensite patches in association with pearlite appears to be responsible for low toughness of these alloys. Microprobe analysis shows some silicon segregation near the graphite nodules and practically little segregation of manganese. Elemental mapping by FE-SEM does not indicate any manganese segregation.
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| Publisher |
Springer Link
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| Date |
2012-08
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| Type |
Article
PeerReviewed |
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| Identifier |
Dasgupta, Ranjan Kumar and Mondal, Dipak Kumar and Chakrabarti, Ajit Kumar and Ganguli, Ashis Chandra (2012) Microstructure and Mechanical Properties of As-Cast Ductile Irons Alloyed with Manganese and Copper. Journal of Materials Engineering and Performance, 21 (8). pp. 1728-1736.
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| Relation |
http://cmeri.csircentral.net/285/
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