The effect of different types of fiber on flexure strength and fracture toughness in SIFCON

2019 ◽  
Vol 214 ◽  
pp. 207-218 ◽  
Author(s):  
Metin Ipek ◽  
Mecbure Aksu
Keyword(s):  
Fracture Toughness ◽  
Flexure Strength ◽  
Different Types

Effect of Sintering Temperature on Microstructure and Properties of VС/Fe Composite

2012 ◽  
Vol 430-432 ◽  
pp. 978-983
Author(s):  
Guo Jun Zhang ◽  
Zhi Ping Sun ◽  
Li Yan Zou
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Sintering Temperature ◽  
Growth Trend ◽  
Flexure Strength ◽  
Microstructure And Properties ◽  
Whole Process ◽  
Relationship Of ◽  
The Relationship ◽  
Composite Samples

VC/Fe composite samples were fabricated by sintering at 1050, 1100 and 1150°C in vacuum. The microstructure and mechanical properties of samples were examined, and the relationship of structure and mechanical properties for VC/Fe composite sintered at different temperature were studied. The results show that fracture toughness, hardness and density is increasing obviously at 1050-1100°Cwith the increasing sintering temperature, but the growth trend increases slowly at 1100-1150°C; in whole process with temperature increased, Flexure strength heighten trend obviously. The microstructure of VC/Fe composite changed from particles piled up together to the microstructure particles closely, VC particles set gradually into Fe with temperature increased, and the gap reduced gradually.

Nickel-Alumina Composites: In Situ Synthesis by a Displacement Reaction, and Mechanical Properties

1994 ◽  
Vol 365 ◽  
Author(s):  
Steven A. Jones ◽  
James M. Burlitch ◽  
Ersan Üstündag ◽  
Jeannie Yoo ◽  
Alan T. Zehnder
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Elastic Constants ◽  
High Performance ◽  
In Situ Synthesis ◽  
Displacement Reaction ◽  
Ductile Phase ◽  
Flexure Strength ◽  
Alumina Composites

ABSTRACTNickel-alumina composites have the potential to be high performance materials. Alumina, with its excellent oxidation resistance, combined with a ductile phase such as nickel may provide a tough material with a lower density and higher Young's modulus, overall, a higher specific modulus than typical Superalloys. Dense, interpenetrating Ni-Al2O3 composites were synthesized using a displacement reaction between NiO and aluminum. The resulting composites were characterized in terms of their mechanical properties such as hardness, flexure strength, fracture toughness and elastic constants. The synthesis, characterization, and mechanical properties, as well as the effect of the interpenetrating microstructure on the toughening mechanisms and other properties will be discussed.

Mechanical Properties of Zirconia/Alumina Nano-Composite after Soaking in Various Water-Based Conditions

2006 ◽  
Vol 309-311 ◽  
pp. 1219-1222 ◽  
Author(s):  
Seiji Ban ◽  
Masahiro Nawa ◽  
Y. Suehiro ◽  
H. Nakanishi
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Tetragonal Zirconia ◽  
Flexure Strength ◽  
Nano Composite ◽  
Dental Restorations ◽  
Dental Restoratives ◽  
All Ceramic ◽  
Water Based ◽  
Before And After

Yttria stabilized tetragonal zirconia polycrystals (Y-TZP) have been applied to dental crown and bridges. Whereas, to further improve its mechanical strength, the zirconia/alumina nano-composite stabilized with cerium oxide (Ce-TZP/Al2O3 nano-composite) was developed. In the present study, biaxial flexure strength, fracture toughness and hardness were determined before and after soaking in water-based conditions and the possibility of application to all ceramic dental restorations was discussed. In comparison to Y-TZP, Ce-TZP/Al2O3 nano-composite has quite high flexure strength and fracture toughness along with satisfied durability for LTAD in various water-based conditions encountered in dentistry. Therefore, it is concluded that the nano-composite can be safely applied to dental restoratives such as all-ceramic bridges.

Improvement of flexure strength and fracture toughness in alumina matrix composites reinforced with carbon nanotubes

2009 ◽  
Vol 517 (1-2) ◽  
pp. 293-299 ◽  
Author(s):  
Sung Wan Kim ◽  
Won Sub Chung ◽  
Kee-Sun Sohn ◽  
Chang-Young Son ◽  
Sunghak Lee
Keyword(s):  
Carbon Nanotubes ◽  
Fracture Toughness ◽  
Matrix Composites ◽  
Alumina Matrix ◽  
Flexure Strength

Effect of Cryogenic Temperature on the Fracture Toughness of Graphite/Epoxy Composites

2005 ◽  
Vol 128 (2) ◽  
pp. 151-157 ◽  
Author(s):  
S. G. Kalarikkal ◽  
B. V. Sankar ◽  
P. G. Ifju
Keyword(s):  
Fracture Toughness ◽  
Composite Laminates ◽  
Cryogenic Temperature ◽  
Liquid Nitrogen Temperature ◽  
Woven Composites ◽  
Cryogenic Temperatures ◽  
Textile Composite ◽  
Different Types ◽  
Cryogenic Conditions ◽  
Displacement Diagram

The research presented in this paper is an effort to better understand the interlaminar fracture behavior of graphite/epoxy composite laminates in cryogenic conditions. Double cantilever beam tests were performed on different types of specimens, at room and cryogenic temperatures, and the fracture toughness was calculated from their load-displacement diagram. Additionally, the fracture toughness of some plain-weave textile composite specimens and specimens treated with nanoparticles (38nmAl2O3) were also measured. It was observed that all specimens, with the exception of woven composites, showed deterioration in fracture toughness at the liquid nitrogen temperature. Nanoparticle treated specimens showed an improvement in fracture toughness, both at room and cryogenic temperatures compared to the control specimens. The woven composite specimens showed an increase in fracture toughness at cryogenic temperature. The results indicate that woven fiber composites may have potential in lightweight cryogenic storage systems.

NI-RESIST

Alloy Digest ◽  
1955 ◽  
Vol 4 (7) ◽  
Keyword(s):  
Fracture Toughness ◽  
Copper Content ◽  
Cast Irons ◽  
International Nickel Company ◽  
Nickel Chromium ◽  
Temperature Performance ◽  
High Nickel ◽  
Different Types ◽  
Resistance To Wear ◽  
Alloy Cast

Abstract NI-RESIST high nickel alloy cast irons have high resistance to wear, corrosion, and heat. They are furnished in seven different types varying primarily in nickel, chromium, and copper content. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive strength as well as fracture toughness and fatigue. It also includes information on high temperature performance and corrosion resistance as well as machining and joining. Filing Code: CI-11. Producer or source: International Nickel Company Inc..

Hardness

1984 ◽  
pp. 334-409
Keyword(s):  
Fracture Toughness ◽  
Residual Stress ◽  
Quality Control ◽  
Tensile Strength ◽  
Temperature Effects ◽  
Hardness Testing ◽  
Hardness Tests ◽  
Different Types ◽  
Hardness Conversion

Abstract Hardness tests provide valuable information about the quality of materials and how they are likely to perform in different types of service. This chapter covers some of the most widely used hardness testing methods, including Vickers, Rockwell, and Brinell tests, Shore scleroscope and Equotip hardness tests, and microindentation tests. It describes the equipment and procedures used, discusses the factors that influence accuracy, and provides hardness conversion equations for different types of materials. It also explains how hardness testing sheds light on anisotropy, machinability, wear, fracture toughness, and tensile strength as well as temperature effects, residual stress, and quality control.

Mechanical and Microstructural Behaviors of Directionally Solidified Al2O3/Al16Ti5O34 Eutectics

2013 ◽  
Vol 446-447 ◽  
pp. 224-229
Author(s):  
Serkan Abali
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Raman Spectroscopy ◽  
Crystal Temperature ◽  
Floating Zone ◽  
Directionally Solidified ◽  
Zone Method ◽  
Flexure Strength ◽  
Floating Zone Method ◽  
The Relationship

In this work, rods of Al2O3–TiO2eutectics containing 65 and 60 wt% Al2O3were grown using the laser floating zone method. Raman spectroscopy was used to determine the phase composition. Creep strength of Al2O3–Al16Ti5O34(65AT) eutectic at 1500°C has 320 MPa, which is about higher thanβ–Al2TiO5/Al2O3(60AT) crystal. Temperature dependence flexure strength, hardness, elasticity and fracture toughness of the Al2O3–Al16Ti5O34andβ–Al2TiO5/Al2O3crystals were analyzed. The relationship between the microstructure and the mechanical properties were analyzed the 60 and 65AT eutectic crystals.

scholarly journals Effect of Different Types of Block Copolymers on Morphology, Mechanical Properties, and Fracture Mechanisms of Bisphenol-F Based Epoxy System

2019 ◽  
Vol 3 (3) ◽  
pp. 68 ◽  
Author(s):  
Bajpai ◽  
Wetzel
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Tensile Strength ◽  
Block Copolymers ◽  
Fracture Energy ◽  
Plastic Zone Size ◽  
Fracture Mechanisms ◽  
Epoxy System ◽  
Bisphenol F ◽  
Different Types

The effect of adding different types of soft block copolymer on the tensile properties, fracture mechanic properties, and thermo-mechanical properties of bisphenol F based epoxy resin were studied. Two different self-assembling block copolymers, (a) constituting of a center block of poly (butyl acrylate) and two side blocks of poly (methyl) methacrylate-co-polar co-monomer (BCP 1) and (b) poly(ethylene oxide)-b-poly(butylene oxide) (PEO-PBO) diblock copolymer (BCP 2), were used with an epoxy-hardener system. The maximum fracture toughness and fracture energy were measured as KIc = 2.75 MPa·m1/2 and GIc = 2.37 kJ/m2 for the 10 wt % of BCP 1 modified system, which were 366% and 2270% higher in comparison to reference epoxy system, and a 63% reduction in tensile strength was also observed. Similarly, for BCP2 modified systems, the maximum value of KIc = 1.65 MPa·m1/2 and GIc = 1.10 kJ/m2 was obtained for epoxy modified with 12 wt % of BCP2 and a reduction of 32% in tensile strength. The fracture toughness and fracture energy were co-related to the plastic zone size for all the modified systems. Finally, the analysis of the fracture surfaces revealed the toughening micro-mechanisms of the nanocomposites.

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