Physical Properties of Wood in Poplar Clones ’I-214’ and ’S1-8’

Ištok, Iva; Sedlar, Tomislav; Šefc, Bogoslav; Sinković, Tomislav; Perković, Tomica

doi:10.5552/drind.2016.1604

Cited by 7 publications

(4 citation statements)

References 13 publications

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“…The mean density before treatment was 0,456 g/cm 3 (with 9,6 % moisture content), coinciding with the interval 0,420 to 0,480 g/cm³, included in AITIM (1997). Other authors obtained lower densities in their studies (Istok et al 2016). This difference can be explained by the intrinsic variety in the properties of the wood, and is increased by the diversity of the development techniques that are applied to this species (plantation framework, pruning, watering, fertilisation, etc.).…”

Section: Resultsmentioning

confidence: 89%

Simultaneous treatment with oil heat and densification on physical properties of Populus × Canadensis wood

Villasante

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Fernández-Serrano

et al. 2021

Maderas, Cienc. tecnol.

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Samples of wood from Populus × canadensis (9,5 % moisture) were treated with olive oil at 195 °C simultaneously with 15 % or 30 % compression densification, and the results were compared with samples subjected to oil heat treatment without densification, and control samples. The density of the treated samples increased by 18 %, 43 % and 1,5 % respectively, and barely changed over the six subsequent months stored inside the laboratory room (at approximately 65 % RH, 20 °C). This was due to the fact that the slight weight increment caused by the additional moisture content was offset by the increase in volume from the springback effect. When subjected to atmospheres with different relative humidities, the treated samples stabilised at the same time as the control samples, although the treated samples had a significantly lower moisture absorption than the control samples. It was also observed that the hygroscopic shrinkage in oil heat densification treatment samples was approximately half those of the control samples. The initial densification was partially lost as a result of springback: approximately 3 % in the first springback at a relative humidity of 65 % RH, and an additional 4 % in the second springback to a relative humidity of 85 % RH. Once this latter relative humidity had been attained, no new losses in densification were observed. The ageing of the oil used in the treatment caused a slight loss of densification in the densest samples.

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Section: Resultsmentioning

confidence: 89%

Simultaneous treatment with oil heat and densification on physical properties of Populus × Canadensis wood

Villasante

Vignote

Fernández-Serrano

et al. 2021

Maderas, Cienc. tecnol.

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“…For example, the density of Scots pine (with 2 to 7 rings) increased when the GRN increased to 23 but sequentially decreased when the GRN increased to 49 (Krauss and Kudela 2011). Ištok et al (2016) reported 0.65 and 0.549 R² values between density and GRN (3 to 18 from pith) for I-214 and S1-8 poplar clones, respectively. The authors also stated that there is a negative correlation between density and GRW.…”

Section: Influence Of Ar Properties On Physical Propertiesmentioning

confidence: 95%

Influence of growth ring number and width on elastic constants of poplar

Aydın,

Aydın

2023

BioRes

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The objective of this work was to evaluate the effect of growth ring number (specimens including 2, 4, and 6 rings from the bark) and growth ring width on elastic constants in the radial direction of Populus x canadensis, which has not been revealed before. The longitudinal (2.25 MHz) and transverse (1 MHz) ultrasonic waves were propagated to calculate the longitudinal (VRR) and shear (VRL, VLR, VTR, and VRT) wave velocities and used to determine the elasticity modulus (ER), and shear moduli (GRL and GRT). The average growth ring widths of specimens including 2, 4, and 6 rings were 17.0 mm, 17.8 mm, and 18.2 mm, respectively. According to the results, only VRL steadily increased with increased ring number, while other velocities fluctuated. The same fluctuations were observed for moduli except for GLR, which constantly increased with ring number. The influence of ring number on velocity was statistically significant only for VRL and VRT. However, all moduli were significantly affected by ring number. Linear regression statistics revealed that there were significant relations between the ring width and density, VRL, VLR, VRT, GRL, and GRT.

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“…Wood is an important renewable natural resource that stores carbon by absorbing CO 2 from the atmosphere. The anatomy of wood influences its physical and mechanical properties [1][2][3][4][5][6][7][8]. Wood is an inhomogeneous, anisotropic, fibrous plant material.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Corrosion and Tribological Properties of WC-Co Tools Hardened with PVD Coatings in Solid Oak Wood Processing

Kazlauskas,

Jankauskas,

Antonov

2024

Coatings

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Corrosion and friction coefficient tests were performed on solid oak wood machined with hard-metal woodworking tools coated with PVD coatings (AlCrN, AlTiN, TiAlN, TiCN and CrN). The tannic acid attacks the carbide more intensively than the PVD coatings. During cutting, corrosion spreads on the cutting edge of the cutter due to mechanical action, which dissolves the cobalt binder of the hard-metal and causes the carbide grains to flake off. After 80 min of contact with the wood, the cobalt content decreases from 3.53 to 1.74%. Depending on the PVD coating material, cracks of 4 to 40 µm in width appear after 120 min (9000 m cutting path). After 120 min of machining, wear, corrosion effects and the influence of corrosion on the coefficients of friction were evaluated for tools with and without PVD coatings. TiCN is the most sensitive to corrosion, while AlCrN and CrN coatings are the least sensitive, with the AlTiN coating being the most affected under real cutting conditions (with mechanical + thermal + corrosion effects) and the tools with CrN and AlCrN coatings being the least affected. Corrosion affects the hard-metal and PVD coatings and reduces the coefficient of friction. The angle between the directions of sliding and sharpening of the cutting edge sharpening significantly influences this parameter. The coefficient of friction of hard-metal WC-Co and PVD coatings is higher in the parallel machining direction than in the perpendicular machining direction and ranges from 16.03% (WC-Co) to 44.8% (AlTiN). The coefficient of friction of hard-metal WC-Co decreases by 5.13% before and after exposure to tannic acid, while the corrosion of PVD coatings reduces it by 4.13% (CrN) to 26.7% (TiAlN).

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Physical Properties of Wood in Poplar Clones ’I-214’ and ’S1-8’

Abstract: • Physical properties play an important role in predicting the quality of wood raw material. Variation in wood density

Cited by 7 publications

References 13 publications

Simultaneous treatment with oil heat and densification on physical properties of Populus × Canadensis wood

Simultaneous treatment with oil heat and densification on physical properties of Populus × Canadensis wood

Influence of growth ring number and width on elastic constants of poplar

Investigation of the Corrosion and Tribological Properties of WC-Co Tools Hardened with PVD Coatings in Solid Oak Wood Processing

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