An investigation into the fracture mechanisms of twinning-induced-plasticity steel sheets under various strain paths

Habibi, Niloufar; Zarei-Hanzaki, A.; Abedi, H.R.

doi:10.1016/j.jmatprotec.2015.04.014

Cited by 38 publications

(11 citation statements)

References 34 publications

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“…Another aspect is the instrument friction with the sheet material that impede the equal plastic deformation. Most of the authors are trying to explain this improper depletion in thickness and technological difficulties during plastic deformation with different surveys introduced by one direction cut (usually identical with the rolling direction (RD)) samples [3][4][5][6]. This approach does not fully explain the differences in the strain values in the other directions relative to the RD.…”

Section: Introductionmentioning

confidence: 99%

Changes in the mechanical properties and microstructure of anisotropic austenitic stainless sheet steel after uniaxial tensile test

Yankov

Nikolova

2017

MATEC Web Conf.

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Abstract. The aim of the investigation is to study the changes in the characteristics of an austenitic sheet material X5CrNi18-10 (1.4301, AISI 304) after a plastic deformation. Samples are cut out from the sheet material at three different directions -0°, 45° and 90° angle to the rolling direction. The changes in the mechanical properties and microstructure of the anisotropic austenitic steel are investigated by mechanical tests (uniaxial tension tests and hardness measurements) and structural analyses (optical and scanning electron microscopy, X-ray diffraction). It is established that the strain induced phase transformation of the metastable austenite to martensite during the tension tests changes the magnetic properties of the steel. It is found out that the sheet anisotropy effect on the uniform deformation, the thickness reduction and structure of the austenite sheet material is more essential for the plastic deformation behaviour than the strain-induced Ȗ ĺ Įǯ phase transformation.

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Section: Introductionmentioning

confidence: 99%

Changes in the mechanical properties and microstructure of anisotropic austenitic stainless sheet steel after uniaxial tensile test

Yankov

Nikolova

2017

MATEC Web Conf.

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“…Based on Equation and , the average r ‐value for the sheet is 0.86, and the planar anisotropy Δ r is −0.38. Compared with the r ‐value of TWIP steel, the Fe–15Mn–2Al–0.6C steel has a similar average r ‐value of 0.899, whereas the planar anisotropy Δ r is only −0.116 . The experimental sheet exhibits more pronounced anisotropy and lower deep drawability.…”

Section: Resultsmentioning

confidence: 93%

“…This phenomenon is more evident in grain B due to its the large size. Therefore, it is easy to activate the different local slip systems during tensile deformation process, leading to subgrain formation and orientation changes …”

Section: Resultsmentioning

confidence: 99%

The Crystallographic Textures and Anisotropy in 2507 Super Duplex Stainless Steel

Gao

Wang

2018

steel research int.

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In this work, the annealing textures in different thickness layers and the Lankford parameter (r‐value) in 2507 duplex stainless steel (DSS) are studied via tensile testing, X‐ray diffraction (XRD), and electron backscatter diffraction (EBSD). The results show that 2507 DSS has poor formability, especially poor deep drawability and noticeable planar anisotropy after cold‐rolling with an average r‐value of 0.86, a planar anisotropy △r of −0.38, and an earring ratio of 7.43. The orientation distribution functions (ODFs) from the different thickness layers show that the texture mainly exists in the ferrite (α) phase, and there is a significant texture gradient in the thickness direction. The texture of the α phase has a strong α‐fiber texture (<110>//RD) and an undeveloped γ‐fiber recrystallization texture (<111>∥ND). The texture intensity of the austenite (γ) phase is weak and is mainly composed of Copper {112}<111>, Brass {110}<112>, Goss {110}<001>, and S {123} <634>. The {001}<110> texture component is highly intense in the α phase and is the dominant reason for the low Lankford parameter (r‐value), whereas the {112}<110> orientation is the main factor for the high planar anisotropy (Δr). The results of the grain orientations after tensile deformation in different directions show that the maximum volume fraction ratios for the {001} and {111} orientations are the root cause of the largest r‐value in the 45° direction.

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“…It is worth mentioning the uniaxial tension mode would force the voids to incline towards the loading direction and restrict their growth. It is caused due to the low stress-triaxiality of this mode, which approaches the pure shearing condition [30][31][32]. The increase in stress-triaxiality leads to more void growth and coalescence, which line up more parallel to the loading direction.…”

Section: Nakajima Punch Stretching Testsmentioning

confidence: 99%

Experimental and Numerical Investigations into the Failure Mechanisms of TRIP700 Steel Sheets

Habibi

Sundararaghavan

Prahl

et al. 2018

Metals

Self Cite

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The formability and failure behavior of transformation-induced plasticity (TRIP) steel blanks were investigated through various stress states. The forming limit diagram (FLD) at fracture was constructed both experimentally and numerically. Numerical studies were performed to evaluate the applicability of different damage criteria in predicting the FLD as well as complex cross-die deep drawing process. The fracture surface and numerical results reveal that the material failed in a different mode for different strain path. Therefore, the Tresca model, which is based on shear stress, accurately predicted the conditions where shear had a profound effect on the damage initiation, whereas Situ localized necking criterion could calculate the conditions in which localization was dominant.

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An investigation into the fracture mechanisms of twinning-induced-plasticity steel sheets under various strain paths

Cited by 38 publications

References 34 publications

Changes in the mechanical properties and microstructure of anisotropic austenitic stainless sheet steel after uniaxial tensile test

Changes in the mechanical properties and microstructure of anisotropic austenitic stainless sheet steel after uniaxial tensile test

The Crystallographic Textures and Anisotropy in 2507 Super Duplex Stainless Steel

Experimental and Numerical Investigations into the Failure Mechanisms of TRIP700 Steel Sheets

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