scholarly journals Optimal spinneret size for improvement of fiber's mechanical property

2013 ◽  
Vol 17 (5) ◽  
pp. 1501-1503 ◽  
Author(s):  
Zhanping Yang ◽  
Li Zhang ◽  
Rou-Xi Chen ◽  
Ji-Huan He ◽  
Jian-Hua Cao ◽  
...  
Keyword(s):  
Mechanical Property ◽  
Cellulose Acetate ◽  
Tensile Property ◽  
Breaking Energy ◽  
Spinning Condition

The effect of spinneret size and place on diameter and tensile property of cellulose acetate fibers is studied, and a criterion for the maximal breaking energy is obtained, and the spinneret distribution can be optimized for each spinning condition.

Study on the Influence of Compression Damage on Tensile Properties in Fully Lamellar TiAl-Based Alloy

2012 ◽  
Vol 482-484 ◽  
pp. 1713-1717
Author(s):  
Bin Tang ◽  
Chuan Jing Chen ◽  
Zhi Yong Xue ◽  
Chun Jing Wu ◽  
Shuang Shou Li
Keyword(s):  
Mechanical Property ◽  
High Temperature ◽  
Tensile Properties ◽  
Tensile Property ◽  
Room Temperature ◽  
Tial Alloy ◽  
Tensile Tests ◽  
Fully Lamellar ◽  
Compression Damage

The changes of the tensile properties of the full lamellar TiAl alloy under pre-compression were studied by means of pre-compression damage tests and tensile tests. The study indicated that：The changes of the tensile property of the damaged alloy at room temperature were different from that of high temperature. The mechanical property of the TiAl alloy degrades because of the present of the cracks, which decrease the load area of the alloy.

Mechanical Property and Corrosion Resistant of Cerium-Bearing 2Cr13 Stainless Steel

2011 ◽  
Vol 308-310 ◽  
pp. 701-705 ◽  
Author(s):  
Li Ping Zhao ◽  
Hui Min Zhang ◽  
Chao Yu Cui ◽  
Xi Sen Sun
Keyword(s):  
Mechanical Property ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Tensile Property ◽  
Good Mechanical Property ◽  
Corrosion Resistant ◽  
Ce Content ◽  
Better Than

The effect of the Ce on the mechanical property and corrosion resistant of the 2Cr13 stainless steel are studied in this research. The conclusions show that the hardness and tensile property of the 2Cr13 steel will decrease with the increasing of the amount of Ce. Although the corrosion resistance of 2Cr13Ce steel is better than 2Cr13 steel, the corrosion resistance of 2Cr13Ce contained 0.28%Ce is better than the steel contained 1.39%Ce. In this experiment, when the Ce content is 0.28%, 2Cr13 stainless steel can have good mechanical property and corrosion resistant.

Development of Metal Hollow Sphere Sheet and its Formability and Mechanical Property

2013 ◽  
Vol 554-557 ◽  
pp. 657-663 ◽  
Author(s):  
Yoshinori Yoshida ◽  
Yoshihiro Otsuka
Keyword(s):  
Mechanical Property ◽  
Tensile Strength ◽  
Tensile Test ◽  
Energy Absorption ◽  
Tensile Property ◽  
Hollow Sphere ◽  
Tungsten Wire ◽  
Tensile Behaviour ◽  
Pure Aluminium ◽  
Sheet Structure

A metal hollow sphere (MHS) sheet structure is developed and its mechanical property is investigated. We performed piercings for steel MHS and placed them on a piece of tungsten wire to make an MHS thread. MHS sheets with two kinds of construction have been developed using the thread; plain weave construction and reverse stitching construction. Their tensile property is investigated through tensile test, where advanced specific tensile strength and plateau tensile behaviour are found. Its mechanism is investigated using video and the properties compared with conventional MHS clusters. A block cluster is made from the sheet and compression property is researched by observing their breaking behaviour. The sheet is introduced into a pure aluminium tube and energy absorption through side compression is evaluated.

Diffusion Dynamics of HAc from Cellulose Acetate Filament during Coagulation Process

2013 ◽  
Vol 842 ◽  
pp. 118-121
Author(s):  
Jiao Li ◽  
Jun Song ◽  
Jian Hua Cao ◽  
Lin Fu Wang ◽  
Qing Lan Zhang
Keyword(s):  
Experimental Data ◽  
Mechanical Property ◽  
Acetic Acid ◽  
Cellulose Acetate ◽  
Diffusion Coefficients ◽  
Coagulation Bath ◽  
Wet Spinning ◽  
Coagulation Process ◽  
Diffusion Dynamics ◽  
Acetate Filament

During dry-wet spinning, diffusion is very important for the formation and mechanical property of fibers. In this paper, the diffusion dynamics of acetic acid (HAc) and water (H2O) during coagulation process of cellulose acetate filament were investigated in detail. The diffusion coefficients of HAc and H2O were calculated based on the Ficks first law of diffusion according to the experimental data. Several factors which affect the coagulation process including concentration and temperature of coagulation bath were discussed respectively. The result showed that the diffusion coefficients of HAc and H2O increased with the increasing coagulation temperature and decreased with the increasing coagulation bath concentration.

scholarly journals Tailor-made zwitterionic polyurethane coatings: microstructure, mechanical property and their antimicrobial performance

RSC Advances ◽  
2017 ◽  
Vol 7 (44) ◽  
pp. 27522-27529 ◽  
Author(s):  
Chunhua Wang ◽  
Chunfeng Ma ◽  
Changdao Mu ◽  
Wei Lin
Keyword(s):  
Mechanical Property ◽  
Phase Separation ◽  
Tensile Property ◽  
Polyurethane Coatings ◽  
Adhesion Performance ◽  
Antimicrobial Performance

Introduction of zwitterions into polyurethane markedly increases micro-phase separation and tensile property, and endow the surfaces with anti-mold adhesion performance.

Cellulose Acetate Reverse Osmosis Membrane Structure

1972 ◽  
Vol 30 ◽  
pp. 528-529
Author(s):  
H. K. Plummer ◽  
E. Eichen ◽  
C. D. Melvin
Keyword(s):  
Cellulose Acetate ◽  
Reverse Osmosis ◽  
Membrane Structure ◽  
Freeze Drying ◽  
Dense Layer ◽  
Water Removal ◽  
Reverse Osmosis Membrane ◽  
Correct Interpretation ◽  
Electron Image ◽  
Scanning Electron

Much of the work reported in the literature on cellulose acetate reverse osmosis membranes has raised new and important questions with regard to the dense or “active” layer of these membranes. Several thickness values and structures have been attributed to the dense layer. To ensure the correct interpretation of the cellulose acetate structure thirteen different preparative techniques have been used in this investigation. These thirteen methods included various combinations of water substitution, freeze drying, freeze sectioning, fracturing, embedding, and microtomy techniques with both transmission and scanning electron microscope observations.It was observed that several factors can cause a distortion of the structure during sample preparation. The most obvious problem of water removal can cause swelling, shrinking, and folds. Improper removal of embedding materials, when used, can cause a loss of electron image contrast and, or structure which could hinder interpretation.

Thermomechanical Treatment of a 4340 Ni-Cr-Mo Alloy Steel

1981 ◽  
Vol 39 ◽  
pp. 314-315 ◽  
Author(s):  
M.T. Jahn ◽  
J.C. Yang ◽  
C.M. Wan
Keyword(s):  
Mechanical Property ◽  
Chemical Composition ◽  
Alloy Steel ◽  
Thermomechanical Treatment ◽  
Room Temperature ◽  
Good Combination ◽  
Thermal Treatments ◽  
Low Carbon ◽  
4340 Steel ◽  
Good Improvement

4340 Ni-Cr-Mo alloy steel is widely used due to its good combination of strength and toughness. The mechanical property of 4340 steel can be improved by various thermal treatments. The influence of thermomechanical treatment (TMT) has been studied in a low carbon Ni-Cr-Mo steel having chemical composition closed to 4340 steel. TMT of 4340 steel is rarely examined up to now. In this study we obtain good improvement on the mechanical property of 4340 steel by TMT. The mechanism is explained in terms of TEM microstructures4340 (0.39C-1.81Ni-0.93Cr-0.26Mo) steel was austenitized at 950°C for 30 minutes. The TMTed specimen (T) was obtained by forging the specimen continuously as the temperature of the specimen was decreasing from 950°C to 600°C followed by oil quenching to room temperature. The thickness reduction ratio by forging is 40%. The conventional specimen (C) was obtained by quenching the specimen directly into room temperature oil after austenitized at 950°C for 30 minutes. All quenched specimens (T and C) were then tempered at 450, 500, 550, 600 or 650°C for four hours respectively.

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