Wear behavior of austempered ductile irons with dual matrix structures

Şahin, Yusuf; Erdoğan, Mehmet; Kılıçlı, Volkan

doi:10.1016/j.msea.2006.06.071

Cited by 53 publications

(33 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The surface properties must be improved in order to prevent this loss and to be preserved decreasing raw material stock and increasing cost [1,2]. All treatments in order to form in the surface of the workpiece that are not collectively in the workpiece are called surface treatments.…”

Section: Introductionmentioning

confidence: 99%

Wear Behavior of DIN 1.2210 Steel Modified by a Pulse Plasma Technique

2016

View full text Add to dashboard Cite

The microstructure and wear properties of pulse plasma treated AISI 4140 steel was investigated. The surface properties of the materials have been improved by modifying the surfaces of the DIN 1.2210 steel with pulse plasma technique. The sample surfaces have been modified by pulse plasma with C3H8, nitrogen and O2 gases. Two different distances between the sample and nozzle and three different numbers of pulse were determined for modification process and the surface process was implemented by using tungsten electrode with 800 µF battery capacity. The optical images were taken of the materials which the surfaces were improved by using pulse plasma technique. The surface modified samples were subjected to X-ray diffraction analysis. Wear tests were performed in a linear wear test machine with 0.15 m/s constant sliding speed under 5 N loads for 200 m sliding distance. The wear rate was changed in accordance with process parameters. The wear resistance increased in the surface modified specimens was compared to that of non-modified ones. Worn surfaces of specimens were studied by scanning electron microscope and energy dispersive spectroscopy analyses techniques. It is determined that the thickness of modification layer changes regarding to the amount of new phases and sample-nozzle distance. It is approved the increase on wear resistance related to wolfram diffusion.

show abstract

Section: Introductionmentioning

confidence: 99%

Wear Behavior of DIN 1.2210 Steel Modified by a Pulse Plasma Technique

2016

View full text Add to dashboard Cite

show abstract

“…In the newly developed ductile cast iron with dual matrix structure, [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] the structure consists of proeutectoid ferrite, and ausferrite (bainitic ferrite and high carbon austenite (it is also called retained, stable or transformed austenite) or martensite. Therefore it is also called Dual Matrix Structure (DMS).…”

Section: Introductionmentioning

confidence: 99%

“…Therefore it is also called Dual Matrix Structure (DMS). [1][2][3][4][5][6][7][8][9][10][11] Austempered ductile iron (ADI) with DMS has been found to be validated for suspension parts of the automotive, owing to its greater ductility than the conventionally heat treated austempered ductile iron. This material showed tensile and proof stress, together with hardness, similar to pearlitic grades, and ductility at the same level as ferritic grades.…”

Section: Introductionmentioning

confidence: 99%

“…Authors had examined the phase transformations, microstructure, mechanical properties (tensile and hardness) and wear behavior of ADI with DMS comprehensively. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] Fatigue properties of ADI with DMS matrix was studied by Verdu et al 41) reported prior to 2005. They produce DMS matrix in ADI using short austenization time (incomplete austenization) following by austempering in their research.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Microstructure on Fatigue Strength of Intercritically Austenitized and Austempered Ductile Irons with Dual Matrix Structures

2013

View full text Add to dashboard Cite

In the present study the fatigue strength of austempered ductile irons with dual matrix structures (ADI with DMS) has been studied for an unalloyed ductile cast iron. For this purpose, specimens were intercritically austenitized (partially austenitized) in two phase region (α + γ ) at various temperatures (810°C, 820°C and 830°C) for 20 minutes and then quenched into salt bath held at austempering temperature of 315°C and 375°C for 120 minutes and then air cooled to room temperature to obtain various ausferrite volume fractions and their morphologies. Conventionally austempered specimens (austempered from 900°C) with fully ausferritic matrix and unalloyed as cast specimens having ferrit + pearlite structures were also tested for a comparison. Rotating bending fatigue test were carried out an the experimental results showed that, in ADI with DMS, volume fraction of ausferrite and continuity of ausferritic structure along intercellular boundaries play important role in determining fatigue strength. The fatigue strength of these specimens increases with increasing ausferrite volume fraction. The fatigue strength was correlated with the ausferrite volume fraction and high carbon austenite and its carbon content. Conventionally austempered specimens exhibited much greater fatigue strength than ADI with DMS specimens.KEY WORDS: austempered ductile iron; dual matrix structure; fatigue; ausferrite volume fraction.

show abstract

“…A significant number of studies have been carried out on the tribological behavior of ADI [5][6][7][8], but few studies have examined scuffing. Magalhães and Seabra [9] found that heat treating to produce a material that is simultaneously strong and ductile, helps resist scuffing.…”

Section: Introductionmentioning

confidence: 99%

Heat treatment–microstructure–mechanical/tribological property relationships in austempered ductile iron

Nasir¹,

Northwood²,

Han³

et al. 2011

WIT Transactions on Engineering Sciences

View full text Add to dashboard Cite

Austempered Ductile Iron (ADI) can offer an excellent combination of low cost, design flexibility, good machinability, high strength-to-weight ratio, good toughness, good wear resistance and fatigue strength. Although ADI has found quite wide application in some industries, its use in automotive parts production has been limited. The properties of ADI can be tailored by changing the heat treatment schedule. In this research a Ni-Cu-Mo ADI was subjected to heat treatment schedules involving various austenitizing and austempering process times and temperatures. The mechanical (hardness, toughness) and tribological (scuffing) properties were determined and they were related to both the microstructures and the heat treatment procedures. The highest scuffing resistance is obtained in ADI with a feathery ausferrite microstructure. Such a microstructure also produces the highest toughness but hardness values are only at the Grade I or II levels.

show abstract

Wear behavior of austempered ductile irons with dual matrix structures

Cited by 53 publications

References 37 publications

Wear Behavior of DIN 1.2210 Steel Modified by a Pulse Plasma Technique

Wear Behavior of DIN 1.2210 Steel Modified by a Pulse Plasma Technique

Effect of Microstructure on Fatigue Strength of Intercritically Austenitized and Austempered Ductile Irons with Dual Matrix Structures

Heat treatment–microstructure–mechanical/tribological property relationships in austempered ductile iron

Contact Info

Product

Resources

About