Bending strength and toughness of heat-treated wood

2000 ◽  
Vol 46 (1) ◽  
pp. 8-15 ◽  
Author(s):  
Yoshitaka Kubojima ◽  
Takeshi Okano ◽  
Masamitsu Ohta
Keyword(s):  
Bending Strength ◽  
Treated Wood ◽  
Heat Treated ◽  
Strength And Toughness

scholarly journals Modification of static bending strength properties of Eucalyptus grandis heat-treated wood

2012 ◽  
Vol 15 (6) ◽  
pp. 922-927 ◽  
Author(s):  
Pedro Henrique Gonzalez de Cademartori ◽  
Eduardo Schneid ◽  
Darci Alberto Gatto ◽  
Rafael Beltrame ◽  
Diego Martins Stangerlin
Keyword(s):  
Bending Strength ◽  
Eucalyptus Grandis ◽  
Treated Wood ◽  
Strength Properties ◽  
Heat Treated

scholarly journals Interaction between Thermal Modification Temperature of Spruce Wood and the Cutting and Fracture Parameters

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6218
Author(s):  
Luďka Hlásková ◽  
Jiří Procházka ◽  
Vít Novák ◽  
Petr Čermák ◽  
Zdeněk Kopecký
Keyword(s):  
Bending Strength ◽  
Reference Sample ◽  
Treated Wood ◽  
Thermal Modification ◽  
Spruce Wood ◽  
Fracture Parameters ◽  
Feed Force ◽  
Heat Treated ◽  
Influence Of Temperature On ◽  
Thermally Modified Wood

This work examines the effect of thermal modification temperatures in the production of thermally modified wood on the cutting and fracture parameters when cutting heat-treated spruce wood by a circular sawblade machine. The samples were thermally modified at 160, 180, 200, and 220 °C. One sample was unmodified and was used as a reference sample. On the basis of the performed experiments, the fracture parameters (fracture toughness and shear yield strength) were calculated for the axial–perpendicular direction of cutting. In comparison with the theoretical assumptions, the influence of temperature on the cutting and fracture parameters was confirmed. Thermally treated wood is characterized by increased fragility and susceptibility to crack formation, as well as reduced density, bending strength, and shear strength. These properties significantly affect the size of the cutting force and feed force, as well as the fracture parameters. As the temperature increases, the values of these parameters decrease. The mentioned material characteristics could be useful for the optimization of the cutting process, as well as for the issue of energy consumption during the machining of heat-treated wood.

scholarly journals Effects of heat treatment on some characteristics of Scots pine (Pinus sylvestris L.) wood

BioResources ◽  
2019 ◽  
Vol 14 (4) ◽  
pp. 9531-9543
Author(s):  
Ekrem Durmaz ◽  
Tutku Ucuncu ◽  
Mehmet Karamanoglu ◽  
Alperen Kaymakci
Keyword(s):  
Heat Treatment ◽  
Pinus Sylvestris ◽  
Scots Pine ◽  
Bending Strength ◽  
Treated Wood ◽  
Crystallinity Index ◽  
Wood Material ◽  
Chemical Surface ◽  
Treatment Processes ◽  
Heat Treated

Heat treatment of wood materials is generally performed to improve the physical, mechanical, chemical, surface, thermal, and crystallinity characteristics. In this way, the usage areas of wood material in different purposes can be expanded by means of heat treatment. The goal of this study was to determine the physical, mechanical, chemical, crystallinity, and surface properties of heat-treated Scots pine (Pinus sylvestris L.) wood. The test samples were heat-treated at 120 °C, 150 °C, 180 °C, and 210 °C for 4 and 6 h in a laboratory-scale oven. The shrinking and swelling chracteristics of wood was decreased as a function of heat treatment processes. Bending strength, compression strength, and modulus of elasticity decreased. In addition, lignin ratios and crystallinity index increased as temperature and duration of the treatment were increased. Consequently, heat-treated wood materials can be used in various areas by developing some of their properties.

COLUMBIA S6

Alloy Digest ◽  
1985 ◽  
Vol 34 (8) ◽  
Keyword(s):  
Wear Resistance ◽  
Physical Properties ◽  
Tool Steel ◽  
Heat Treating ◽  
Steel Company ◽  
High Hardenability ◽  
Heat Treated ◽  
Strength And Toughness

Abstract COLUMBIA S6 is a silicon-manganese shock-resisting tool steel with fairly high hardenability. It offers superior toughness and wear resistance when compared to conventional shock-resisting steels heat treated to Rockwell C 54 to 56. For optimum strength and toughness, parts should be tempered within the range 400 to 600 F. Among its many applications are shear blades, punches, hand chisels and pneumatic tools. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming, heat treating, and machining. Filing Code: TS-445. Producer or source: Columbia Tool Steel Company.

Meta‐analysis of anti‐swelling efficiency (ASE) of heat‐treated wood

2021 ◽  
Author(s):  
Tianyi Zhan ◽  
Zhiting Liu ◽  
Hui Peng ◽  
Jiali Jiang ◽  
Yaoli Zhang ◽  
...  
Keyword(s):  
Meta Analysis ◽  
Treated Wood ◽  
Heat Treated

scholarly journals Temperature-Dependent Creep Behavior and Quasi-Static Mechanical Properties of Heat-Treated Wood

Forests ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 968
Author(s):  
Dong Xing ◽  
Xinzhou Wang ◽  
Siqun Wang
Keyword(s):  
Mechanical Properties ◽  
Creep Behavior ◽  
Cell Walls ◽  
Treated Wood ◽  
Crosslinking Reaction ◽  
Depth Sensing ◽  
Temperature Dependent ◽  
Heat Treated ◽  
Static Mechanical ◽  
Static Mechanical Properties

In this paper, Berkovich depth-sensing indentation has been used to study the effects of the temperature-dependent quasi-static mechanical properties and creep deformation of heat-treated wood at temperatures from 20 °C to 180 °C. The characteristics of the load–depth curve, creep strain rate, creep compliance, and creep stress exponent of heat-treated wood are evaluated. The results showed that high temperature heat treatment improved the hardness of wood cell walls and reduced the creep rate of wood cell walls. This is mainly due to the improvement of the crystallinity of the cellulose, and the recondensation and crosslinking reaction of the lignocellulose structure. The Burgers model is well fitted to study the creep behavior of heat-treated wood cell walls under different temperatures.

Bonding performance of heat treated wood with structural adhesives

2007 ◽  
Vol 66 (3) ◽  
pp. 173-180 ◽  
Author(s):  
Milan Sernek ◽  
Michiel Boonstra ◽  
Antonio Pizzi ◽  
Aurelien Despres ◽  
Philippe Gérardin
Keyword(s):  
Treated Wood ◽  
Structural Adhesives ◽  
Bonding Performance ◽  
Heat Treated

Comparison of the color and weight change in Paulownia tomentosa and Pinus koraiensis wood heat-treated in hot oil and hot air

BioResources ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. 5574-5585
Author(s):  
Intan Fajar Suri ◽  
Jong Ho Kim ◽  
Byantara Darsan Purusatama ◽  
Go Un Yang ◽  
Denni Prasetia ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Color Change ◽  
Treated Wood ◽  
Pinus Koraiensis ◽  
Weight Changes ◽  
Paulownia Tomentosa ◽  
Wood Color ◽  
Color Changes ◽  
Hot Air ◽  
Heat Treated

Color changes were tested and compared for heat-treated Paulownia tomentosa and Pinus koraiensis wood treated with hot oil or hot air for further utilization of these species. Hot oil and hot air treatments were conducted at 180, 200, and 220 °C for 1, 2, and 3 h. Heat-treated wood color changes were determined using the CIE-Lab color system. Weight changes of the wood before and after heat treatment were also determined. The weight of the oil heat-treated wood increased considerably but it decreased in air heat-treated wood. The oil heat-treated samples showed a greater decrease in lightness (L*) than air heat-treated samples. A significant change in L* was observed in Paulownia tomentosa. The red/green chromaticity (a*) of both wood samples increased at 180 and 200 °C and slightly decreased at 220 °C. The yellow/blue chromaticity (b*) in both wood samples increased at 180 °C, but it rapidly decreased with increasing treatment durations at 200 and 220 °C. The overall color change (ΔE*) in both heat treatments increased with increasing temperature, being higher in Paulownia tomentosa than in Pinus koraiensis. In conclusion, oil heat treatment reduced treatment duration and was a more effective method than air heat treatment in improving wood color.

Research on Damage and Bending Properties of AZ31 Magnesium Alloy

2012 ◽  
Vol 184-185 ◽  
pp. 1163-1166
Author(s):  
Xi An Xie ◽  
Gao Feng Quan
Keyword(s):  
Magnesium Alloy ◽  
Applied Load ◽  
Bending Strength ◽  
Az31 Magnesium Alloy ◽  
Bending Test ◽  
Bending Properties ◽  
Four Point Bending ◽  
Heat Treated ◽  
Four Point Bending Test ◽  
Initial Cracks

Through the four-point bending test of lath-shaped heat treated AZ31 magnesium alloy, the bending properties and damage characteristics were explored. The results show that the optimal bending strength of the magnesium alloy were 355.1MPa and 259.2MPa for extruded and cast samples, respectively, after corresponding heat treatment with 350°C, 90min and 400°C, 30min. The initial cracks both occurred at the loading point after applied load exceeded the yield limit of AZ31 magnesium alloy. Surface bump, cracks and other damage morphology accompanied by a large number of twinning organizations were found on the surface of the samples.

Sign in / Sign up

Export Citation Format

Share Document