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Erdoğan, Mehmet

doi:10.1023/a:1016548922555

Cited by 129 publications

(42 citation statements)

References 9 publications

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“…In addition to mechanisms that involve crack initiation and propagation within the martensite islands, failure of the ferrite-martensite (F-M) interface is another damage initiation mechanism that is reported for DP steels [5,7]. Uggowitzer and Stuwe [19] related this type of failure to the separation of inclusions from the martensite islands close to the interface with ferrite.…”

Section: Damage Mechanisms At the Boundariesmentioning

confidence: 99%

“…They measured the dimensional change of several martensite islands in a DP700 steel with 15% volume fraction of martensite and reported that this phase undergoes plastic strain values of up to 50% before final fracture. It is found that voids are associated with either non-metallic inclusions or martensite islands in DP steels [5]. The major void formation mechanisms reported [5][6][7] for DP steels include: 1) decohesion of the ferritemartensite interface, 2) fracture of martensite islands, and 3) voids generated in the martensite islands due to either the separation of prior austenite grain boundaries between adjacent martensite islands or the localized deformation within the martensite phase.…”

Section: Introductionmentioning

confidence: 97%

“…It is found that voids are associated with either non-metallic inclusions or martensite islands in DP steels [5]. The major void formation mechanisms reported [5][6][7] for DP steels include: 1) decohesion of the ferritemartensite interface, 2) fracture of martensite islands, and 3) voids generated in the martensite islands due to either the separation of prior austenite grain boundaries between adjacent martensite islands or the localized deformation within the martensite phase. The martensite cracking was found to be more frequent in a coarse martensite microstructure [5,7].…”

Section: Introductionmentioning

confidence: 97%

“…The major void formation mechanisms reported [5][6][7] for DP steels include: 1) decohesion of the ferritemartensite interface, 2) fracture of martensite islands, and 3) voids generated in the martensite islands due to either the separation of prior austenite grain boundaries between adjacent martensite islands or the localized deformation within the martensite phase. The martensite cracking was found to be more frequent in a coarse martensite microstructure [5,7]. The martensite failure may occur due to : i) decohesion of prior austenite grain boundaries [8,9], ii) fracture of martensite islands due to crack initiation [10] and iii) decohesion at the ferrite-martensite interface [11].…”

Section: Introductionmentioning

confidence: 99%

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Failure mechanisms in DP600 steel: Initiation, evolution and fracture

Ghadbeigi¹,

Pinna²,

Celotto³

2013

Materials Science and Engineering: A

115

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Section: Damage Mechanisms At the Boundariesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Failure mechanisms in DP600 steel: Initiation, evolution and fracture

Ghadbeigi¹,

Pinna²,

Celotto³

2013

Materials Science and Engineering: A

115

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“…Yi et al 31) concluded that "transformed" (new) ferrite forms by means of a nucleation and growth mechanism. However, most authors 27,28,[32][33][34][35][36][37][38] affirm that ferrite formed from intercritically annealed austenite grows epitaxially on the "retained" or "old" ferrite during cooling at medium rates. Compared to full austenitization, the IA can accelerate the formation of new ferrite due to the presence of pre-existing austenite/ferrite phase boundaries.…”

Section: The Role Of New Ferrite On Retained Austenite Stabilization mentioning

confidence: 99%

The Role of New Ferrite on Retained Austenite Stabilization in Al-TRIP Steels

2010

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Microstructure and mechanical properties of two high Al, low-Si TRIP steels with different Cr and Mo contents were studied using continuous galvanizing line (CGL) laboratory simulation. Combined use of specific etching methods, optical and electron microscopy observations and EBSD characterization led to verify the epitaxial growth of ferrite during cooling at a moderate rate from the intercritical annealing to the isothermal holding temperature. The amounts of "new" ferrite formed during cooling and retained austenite obtained after processing are much higher in the steel with lower content of hardenability-promoting elements. Measured tensile properties and mechanical behavior of the steel strongly depend on the amount of new ferrite and retained austenite. It is found that the formation of new epitaxial ferrite from intercritical austenite can effectively contribute to the chemical and particle size stabilization of untransformed austenite as well as to obtain the desired TRIP effect under processing conditions highly compatible with industrial practice, i.e. cooling rates near 15°C/s and isothermal holding times at 460°C shorter than 60 s.

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Electrochemical corrosion response of a low carbon heat treated steel in a NaCl solution

Osório

Peixoto

Garcia

et al. 2009

Materials & Corrosion

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Dual-phase (DP) steels are produced from a specific heat treatment procedure and have recently emerged as a potential class of engineering materials for a number of structural and automobile applications. Such steels have high strength-to-weight ratio and reasonable formability. The present study aims to investigate the effects of four different and conventional heat treatments (i.e., hot rolling, normalizing, annealing, and intercritical annealing) on the resulting microstructural patterns and on the electrochemical corrosion behavior. Electrochemical impedance spectroscopy (EIS) and Tafel plots were carried out on heat treated steel samples in a 0.5 M NaCl solution at 25 8C with neutral pH. An equivalent circuit analysis was also used to provide quantitative support for the discussions. The normalizing and the annealing heat treatments have provided the highest and the lowest corrosion resistances, respectively. The intercritical annealing and as-received (hot rolled) low carbon steel samples have shown similar corrosion behavior. Although a deleterious effect on the corrosion resistance has been verified for DP steel due to the residual stress from the martensite formation, it combines good mechanical properties with intermediate electrochemical corrosion resistance.

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Cited by 129 publications

References 9 publications

Failure mechanisms in DP600 steel: Initiation, evolution and fracture

Failure mechanisms in DP600 steel: Initiation, evolution and fracture

The Role of New Ferrite on Retained Austenite Stabilization in Al-TRIP Steels

Electrochemical corrosion response of a low carbon heat treated steel in a NaCl solution

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