Analysis of Solidification Behavior of Compacted Graphite Iron Exhaust Manifold and Its Comparison with Si-Mo Ductile Iron

2021 ◽  
Author(s):  
Prafull Patil ◽  
Basker Balaji P K ◽  
Mohammad Saifullah Khan
Keyword(s):  
Ductile Iron ◽  
Exhaust Manifold ◽  
Compacted Graphite Iron ◽  
Solidification Behavior ◽  
Compacted Graphite

scholarly journals The Production Technology of a Modern Material for Heavy Automotive Vehicles - A Compacted Graphite Iron (C.G.I.)

2016 ◽  
Vol 3 (2) ◽  
Author(s):  
Prof. S. K. Paknikar
Keyword(s):  
Ductile Iron ◽  
Spheroidal Graphite ◽  
Intermediate Form ◽  
Compacted Graphite Iron ◽  
Modern Material ◽  
Compacted Graphite ◽  
Cerium Content ◽  
Production Techniques ◽  
Improved Performance ◽  
Strength And Stiffness

<p>The invention of Compacted Graphite Iron and documentation of Compacted Graphite Iron (C.G.I.) were made during pioneering research on production techniques in the late 1940s. They found that when the residual magnesium or cerium content was insufficient to stabilize a fully spheroidal graphite then the intermediate form of graphite is formed which is Compacted Graphite or vermicular appeared in the microstructure. It was up to 1960s that CGI began to be recognized as a modern material combining much of the strength and stiffness of ductile iron with the thermal conductivity and castability of grey cast iron.</p><p>Today the result is that where reduced weight and improved performance particularly for automobile cylinder blocks and heads; where mechanical and physical properties of CGI can contribute to meeting the conflicting requirements of weight reduction, improved performance, reduced emissions, recyclability and cost reduction there is tremendous demand for Compacted Graphite Iron to substitute grey iron or ductile iron castings.</p>

scholarly journals Interfacial debonding in compacted graphite iron: effect of thermal loading

2020 ◽  
Vol 28 ◽  
pp. 1286-1294
Author(s):  
Evangelia Nektaria Palkanoglou ◽  
Konstantinos P. Baxevanakis ◽  
Vadim V. Silberschmidt
Keyword(s):  
Thermal Loading ◽  
Interfacial Debonding ◽  
Compacted Graphite Iron ◽  
Compacted Graphite

Effects of Mo and Ni on the thermal conductivity of compacted graphite iron at elevated temperature

2019 ◽  
Vol 32 (5-6) ◽  
pp. 243-251 ◽  
Author(s):  
Dongmei Xu ◽  
Guiquan Wang ◽  
Xiang Chen ◽  
Yanxiang Li ◽  
Yuan Liu ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Elevated Temperature ◽  
Compacted Graphite Iron ◽  
Compacted Graphite

Cutting Tool Wear and Mechanisms of Chip Formation During High-Speed Machining of Compacted Graphite Iron

2007 ◽  
Author(s):  
Niniza S. P. Dlamini ◽  
Iakovos Sigalas ◽  
Andreas Koursaris
Keyword(s):  
Tool Wear ◽  
Surface Finish ◽  
Failure Criterion ◽  
Cutting Tool ◽  
Flank Wear ◽  
Cutting Tools ◽  
Compacted Graphite Iron ◽  
Crater Wear ◽  
Compacted Graphite ◽  
Cutting Speeds

Cutting tool wear of polycrystalline cubic boron nitride (PcBN) tools was investigated in oblique turning experiments when machining compacted graphite iron at high cutting speeds, with the intention of elucidating the failure mechanisms of the cutting tools and presenting an analysis of the chip formation process. Dry finish turning experiments were conducted in a CNC lathe at cutting speeds in the range of 500–800m/min, at a feed rate of 0.05mm/rev and depth of cut of 0.2mm. Two different tool end-of-life criteria were used: a maximum flank wear scar size of 0.3mm (flank wear failure criterion) or loss of cutting edge due to rapid crater wear to a point where the cutting tool cannot machine with an acceptable surface finish (surface finish criterion). At high cutting speeds, the cutting tools failed prior to reaching the flank wear failure criterion due to rapid crater wear on the rake face of the cutting tools. Chip analysis, using SEM, revealed shear localized chips, with adiabatic shear bands produced in the primary and secondary shear zones.

scholarly journals Scratch Behaviour of Silicon Solid Solution Strengthened Ferritic Compacted Graphite Iron (CGI)

2018 ◽  
Vol 925 ◽  
pp. 318-325
Author(s):  
Rohollah Ghasemi ◽  
Anders E.W. Jarfors
Keyword(s):  
Solid Solution ◽  
Normal Load ◽  
Scratch Test ◽  
Scratch Resistance ◽  
Compacted Graphite Iron ◽  
Depth Of Penetration ◽  
Scratch Depth ◽  
Compacted Graphite ◽  
Diamond Indenter ◽  
Different Content

The present study focuses on scratch behaviour of a conventional pearlitic and a number of solid solution strengthened ferritic Compacted Graphite Iron (CGI) alloys. This was done by employing a single-pass microscratch test using a sphero-conical diamond indenter under different constant normal loads conditions. Matrix solution hardening was made by alloying with different content of Si alloy; (3.66, 4.09 and 4.59 wt%. Si) which are named as low-Si, medium-Si and high-Si ferritic CGI alloys, respectively. A good correlation between the tensile and scratch test results was observed explaining the influence of CGI’s matrix characteristics on scratch behaviour both for pearlitic and fully ferritic solution strengthened ones. Both the scratch depth and scratch width showed strong tendency to increase with increasing the normal load, however the pearlitic one showed more profound deformation compared to the solution strengthened CGI alloys. Among the investigated alloys, the maximum and minimum scratch resistance was observed for high-Si ferritic CGI and pearlitic alloys, respectively. It was confirmed by the scratched surfaces analysed using Scanning Electron Microscopy (SEM) as well. In addition, the indenter’s depth of penetration value (scratch depth) was found as a suitable measure to ascertain the scratch resistance of CGI alloys.Keywords: Silicon solution strengthening, CGI, Abrasion, Scratch testing, Scratch resistance

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