On nucleation and propagation of PLC bands in an Al–3Mg alloy

Casarotto, Leobaldo; Dierke, H.; Tutsch, Rainer; Neuhäuser, H.

doi:10.1016/j.msea.2009.07.043

Cited by 39 publications

(22 citation statements)

References 96 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to the study, only the mode of propagation of the band on the test specimen varies, but the inherent character of the band may stay unchanged. Cassarotto et al [24] also emphasized the same point: type B bands were found to be type A bands that no longer propagated in a soliton-like manner. Optical extensometry and infrared thermography have shown that continuously propagating type A bands are reflected from the ends of a specimen gauge and change their inclination to the opposite direction with respect to the tensile axis after reflection [42], as illustrated in figure 7.…”

Section: Plc Bandsmentioning

confidence: 87%

“…Each stress drop of a serrated plastic flow that occurs during a constant-strain-rate test corresponds to a macroscopically observable plastic avalanche of one of these localized bands [23,24]. Experimental observations have shown that PLC bands are of different types, and the transition between band types may occur upon changes in strain rate and temperature [25,26].…”

Section: Plc Effectmentioning

confidence: 99%

“…The bands remain unchanged during increases in stress, and cyclic strain accumulation occurs outside the bands shortly before a new band is generated [82]. A procedure recently developed by Casarotto et al [24] uses the DIC technique with a triggered CMOS camera and a line-scan camera to correlate the changes in local and global strains by scanning both surfaces of a flat specimen.…”

Section: Digital Image Correlationmentioning

confidence: 99%

See 2 more Smart Citations

The Portevin–Le Chatelier effect: a review of experimental findings

Yılmaz¹

2011

Science and Technology of Advanced Materials

242

View full text Add to dashboard Cite

The Portevin-Le Chatelier (PLC) effect manifests itself as an unstable plastic flow during tensile tests of some dilute alloys under certain regimes of strain rate and temperature. The plastic strain becomes localized in the form of bands which move along a specimen gauge in various ways as the PLC effect occurs. Because the localization of strain causes degradation of the inherent structural properties and surface quality of materials, understanding the effect is crucial for the effective use of alloys. The characteristic behaviors of localized strain bands and techniques commonly used to study the PLC effect are summarized in this review. A brief overview of experimental findings, the effect of material properties and test parameters on the PLC effect, and some discussion on the mechanisms of the effect are included. Tests for predicting the early failure of structural materials due to embrittlement induced by the PLC effect are also discussed.

show abstract

Section: Plc Bandsmentioning

confidence: 87%

Section: Plc Effectmentioning

confidence: 99%

Section: Digital Image Correlationmentioning

confidence: 99%

See 1 more Smart Citation

The Portevin–Le Chatelier effect: a review of experimental findings

Yılmaz¹

2011

Science and Technology of Advanced Materials

242

View full text Add to dashboard Cite

show abstract

“…The Al-Mg alloy (AA5754-O) studied here is known to experience dynamic ageing during plastic deformation at room temperature leading to Portevin-Le Chatelier (PLC) phenomenon [18][19][20][21][22][23][24]. The PLC effect is characterised by plastic instabilities, i.e.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Temperature on Anisotropy Properties of an Aluminium Alloy

et al. 2010

View full text Add to dashboard Cite

International audienceThe temperature influence on the mechanical behaviour during plastic deformation of an AA5754-O aluminium alloy has been investigated by several experimental tests. First, monotonous tensile tests were carried out from room temperature up to 200°C with a classical tensile machine and with a less conventional testing apparatus involving the heating of the sample by Joule effect. With this second testing apparatus, the strain fields and tensile curves were obtained in function of temperature by means of a non-contacting optical 3D deformation measuring system. Moreover, shear tests were performed in the same temperature range. It is shown that the anisotropy coefficients are rather constant within this temperature range, with a relative variation less than 8%. For both tensile and shear tests, the stress levels are similar at the beginning of straining at room temperature and 150°C, except that the Portevin-Le Chatelier (PLC) phenomenon disappears at elevated temperature, and then evolves differently. At 200°C, the stress level is clearly below whatever the deformation. In the framework of drawing process, the formability of this alloy at temperatures higher than 150°C seems to be improved

show abstract

“…Venkatraman et al [14][15][16] have successfully applied thermal imaging for characterizing the process of tensile deformation in AISI 316 SS for early detection of necking and failure zones. Localized deformation by PLC bands (a similar plastic instability phenomenon with repeated locking and unlocking of dislocations) have also been successfully characterized and correlated to various stress levels in the stress-strain curve using IRT and DIC [17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%