Three-Dimensional Crystal Plasticity Modelling of High-Strength Tool Steels Using Fourier Based Spectral Solver

2020 ◽  
Author(s):  
Youssef Ibrahim ◽  
Khaled H. Khafagy ◽  
Tarek M. Hatem ◽  
Hesham A. Hegazi
Keyword(s):  
Tool Steel ◽  
Crystal Plasticity ◽  
High Speed ◽  
Impact Resistance ◽  
Three Dimensional ◽  
High Strength ◽  
Uniaxial Tensile ◽  
Fast Fourier Transformation ◽  
Tool Steels ◽  
Steel Alloys

Abstract Tool steels are essential for any industry, being used to cut, drill, form, shear, and shape ferrous and non-ferrous materials in bulk or powder forms. Due to the harsh service environment, tool steels are engineered with superior properties that include high wear, corrosion, and impact resistance. The macro properties of tool steel alloys are acknowledged to depend upon their fine martensitic microstructure. Therefore, accurate representation of its microstructures will help to further study its behavior which shall lead in advancing and improving their properties. In the current research, a novel microstructure generator for tool steel alloys will be used to precisely simulate complex microstructures of tool steels. The novel generating algorithm along with multiple-slip crystal plasticity based model and specialize spectral solver formulations are used to investigate high-speed tools steels behavior. The spectral method for elastoviscoplastic boundary value problems implicitly uses fast Fourier transformation algorithm (FFT) by applying periodic BCs. Both quasi-static and dynamic uniaxial tensile loading in the [010] direction is applied on a RVE of AISI H11 martensitic tool steel. Validating the numerical results with the experimental results of tool steels is presented.

scholarly journals Impact Resistance Study of Three-Dimensional Orthogonal Carbon Fibers/BMI Resin Woven Composites

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4376
Author(s):  
Yanqi Hu ◽  
Zekan He ◽  
Haijun Xuan
Keyword(s):  
Carbon Fibers ◽  
High Efficiency ◽  
Laminated Composites ◽  
Impact Resistance ◽  
Three Dimensional ◽  
High Strength ◽  
Woven Composites ◽  
Failure Behavior ◽  
Bismaleimide Resin ◽  
Modeling Strategy

Three-dimensional woven composites have been reported to have superior fracture toughness, fatigue life and damage tolerance compared with laminated composites due to through-thickness reinforcement. These properties make them lighter replacements for traditional high-strength metals and laminated composites. This paper will present impact resistance research on three-dimensional orthogonal woven composites consisting of carbon fibers/bismaleimide resin (BMI). A series of impact tests were conducted using the gas gun technique with the impacted target of 150 mm × 150 mm × 8 mm (length × width × thickness) and the cylindrical titanium projectile. The projectile velocity ranged from 180 m/s to 280 m/s, generating different results from rebound to perforation. This paper also presents a multiscale modeling strategy to investigate the damage and failure behavior of three-dimensional woven composites. The microscale and mesoscale are identified to consider the fiber/matrix scale and the tow architecture scale respectively. The macroscale model was effective with homogenized feature. Then a combined meso-macroscale model was developed with the interface definitions for component analysis in the explicit dynamic software LS-DYNA. The presented results showed reliable interface connection and can be used to study localized composites damage at a relatively high efficiency.

CARPENTER MICRO-MELT M-42 ALLOY

Alloy Digest ◽  
1992 ◽  
Vol 41 (3) ◽  
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
Powder Metallurgy ◽  
Physical Properties ◽  
Tool Steel ◽  
High Speed ◽  
Heat Treating ◽  
Uniform Structure ◽  
Tool Steels ◽  
Production Technique

Abstract CARPENTER MICRO-MELT M-42 alloy is a super-high-speed tool steel produced by powder metallurgy. This production technique results in a more uniform structure, greater ease of grinding, improved wear resistance and toughness than is characteristic of conventionally produced high-speed tool steels. This datasheet provides information on composition, physical properties, hardness, and elasticity as well as fracture toughness. It also includes information on forming and heat treating. Filing Code: TS-510. Producer or source: Carpenter.

Gigacycle Fatigue Response of PM versus Ingot Metallurgy Tool Steels

2011 ◽  
Vol 672 ◽  
pp. 23-30 ◽  
Author(s):  
Herbert Danninger ◽  
Christian Sohar ◽  
Christian Gierl Mayer ◽  
Agnieszka Betzwar-Kotas ◽  
Brigitte Weiss
Keyword(s):  
Tool Steel ◽  
High Speed ◽  
Cold Work ◽  
Ingot Metallurgy ◽  
Tool Steels ◽  
Endurance Strength ◽  
Steel Grades ◽  
Primary Carbides ◽  
Effect Of The Composition ◽  
Large Primary

In this work, the gigacycle fatigue response of several tool steel grades has been studied using an ultrasonic resonance testing device. It showed that both with ingot metallurgy (IM) and powder metallurgy (PM) tool steels, a true fatigue limit does not exist up to 10E10 cycles. PM steels resulted in significantly higher endurance strength levels than IM grades. However, there was virtually no effect of the composition and hardness of the materials, both for PM and IM grades cold work tool steels and high speed steels exhibiting virtually the same S-N curves. In the IM tool steel grades, crack initiation started at large primary carbides or carbide clusters, while in the PM grades, nonmetallic inclusions were the critical sites. In any case it is very important to avoid introducing residual stresses into the specimen surfaces during preparation, which would markedly shift the endurance strength levels.

Two-dimensional (2D) fabrics and three-dimensional (3D) preforms for ballistic and stabbing protection: A review

2016 ◽  
Vol 87 (18) ◽  
pp. 2275-2304 ◽  
Author(s):  
Kadir Bilisik
Keyword(s):  
Impact Resistance ◽  
Three Dimensional ◽  
Shear Thickening ◽  
High Strength ◽  
Computational Techniques ◽  
Two Dimensional ◽  
Shear Thickening Fluids ◽  
Recent Developments ◽  
Ballistic Properties ◽  
The Impact

In this study, the impact resistance of two-dimensional (2D) fabrics and three-dimensional (3D) preforms is explained. These fabrics and preforms include 2D and 3D woven and knitted flat and circular fabrics. Various types of soft/layered structures as well as rigid composite are outlined with some design examples for ballistic and stab threats. The recent developments in nanotubes/nanofibers and shear-thickening fluids (STF) for ballistic fabrics are reviewed. The ballistic properties of single- and multi-layered fabrics are discussed. Their impact mechanism is explained for both soft vest and rigid armor applications. Analytical modeling and computational techniques for the estimation of ballistic properties are outlined. It is concluded that the ballistic/stab properties of fiber-reinforced soft and rigid composites can be enhanced by using high-strength fibers and tough matrices as well as specialized nanomaterials. Ballistic/stab resistance properties were also improved by the development of special fabric architectures. All these design factors are of primary importance for achieving flexible and lightweight ballistic structures with a high ballistic limit.

scholarly journals Tool Steels. Austenitization and Carbide Dissolution of High Speed Tool Steel JIS-SKH51 in Short Time Heating.

DENKI-SEIKO ◽  
2000 ◽  
Vol 71 (2) ◽  
pp. 131-139 ◽  
Author(s):  
Kozo Ozaki ◽  
Tatsumi Urita ◽  
Hisaki Koga ◽  
Jyunichi Goya
Keyword(s):  
Tool Steel ◽  
High Speed ◽  
Tool Steels ◽  
Carbide Dissolution ◽  
Short Time

scholarly journals Tool Steels. The Development of High-hardenability High Speed Tool Steel MH88.

DENKI-SEIKO ◽  
1997 ◽  
Vol 68 (2) ◽  
pp. 123-128 ◽  
Author(s):  
Yukinori Matsuda ◽  
Tamiki Yanagisawa
Keyword(s):  
Tool Steel ◽  
High Speed ◽  
Tool Steels ◽  
High Hardenability

scholarly journals Nanomodified rapid hardening concretes reinforced with dispersed basaltic fibers

2021 ◽  
pp. 57-63
Author(s):  
Serhiy Korolko ◽  
Bohdan Seredyuk
Keyword(s):  
Crack Resistance ◽  
High Strength Concrete ◽  
High Speed ◽  
Impact Resistance ◽  
High Strength ◽  
Chemical Additives ◽  
Ultrafine Fibers ◽  
Strength Concrete ◽  
Technical Performance ◽  
Increased Strength

The article considers modern perspectives and directions of using fast – hardening high – strength concretes for protection against striking factors of action of different types of weapons. It is shown that the use of concrete materials in weapons and military equipment is one of the important components of defense structures and protective fortifications during hostilities as platoons and bases, and structures for the protection of civilians. The possibility of obtaining such concretes for the creation of special purpose fortifications is shown. Developed concrete structures have increased strength and impact resistance to high-speed impact. Due to the reinforcement of the concrete structure with mineral and chemical additives and ultrafine fibers, high rates of early strength, viscosity, crack resistance and impact resistance are achieved. The paper presents the main indicators of water consumption, strength and impact resistance of high-strength concrete. The results of the experimental study of samples of the destroyed concrete elements are presented and the corresponding conclusions concerning the use of various types of fibers for reinforcement of such concretes and increase of their crack resistance by basalt fibers are made. It is shown that a high-strength concrete with high construction and technical performance can be successfully used to create protective fortifications and fortifications for special purposes.

ELECTRITE TATMO

Alloy Digest ◽  
1974 ◽  
Vol 23 (3) ◽  
Keyword(s):  
Fracture Toughness ◽  
Physical Properties ◽  
Tool Steel ◽  
High Speed ◽  
Low Cost ◽  
High Speed Steel ◽  
Heat Treating ◽  
General Purpose ◽  
Tool Steels ◽  
Steel Company

Abstract ELECTRITE TATMO is a molybdenum type high-speed steel and is recommended as a general purpose tool steel. It has good toughness and excellent grindability along with a relatively low cost. These factors make it an economic and efficient member of the high-speed family of tool steels. This datasheet provides information on composition, physical properties, hardness, and elasticity as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: TS-268. Producer or source: Latrobe Steel Company.

CARPENTER FOUR-STAR

Alloy Digest ◽  
1972 ◽  
Vol 21 (5) ◽  
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
Tool Steel ◽  
High Speed ◽  
High Strength ◽  
Heat Treating ◽  
High Carbon

Abstract CARPENTER FOUR-STAR is a molybdenum-tungsten high-speed tool steel with high carbon and vanadium contents. It has excellent wear resistance along with high strength. This datasheet provides information on composition and hardness as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: TS-242. Producer or source: Carpenter.

Sign in / Sign up

Export Citation Format

Share Document