Thermo-Mechanical Behaviour of Spheroidal Graphite Iron

2014 ◽  
Vol 611-612 ◽  
pp. 1250-1257 ◽  
Author(s):  
Kevin Le Mercier ◽  
Michel Watremez ◽  
Laurence Fouilland ◽  
Jean Dominique Guérin ◽  
Laurent Dubar
Keyword(s):  
Mechanical Behaviour ◽  
Testing Temperature ◽  
Spheroidal Graphite ◽  
Compression Tests ◽  
Shear Tests ◽  
Rheological Models ◽  
Precise Control ◽  
Sg Iron ◽  
Gleeble 3500 ◽  
Gleeble 3500 System

The main objective of this paper is to identify the thermo-mechanical behaviour of the spheroidal graphite (SG) iron EN-GJS-700. In the first instance, compression tests are carried out using Gleeble 3500 system enabling a precise control on testing temperature and strain rate. The effects of these testing parameters on the SG iron behaviour are studied. Through this, the occurrence of dynamic recrystallization phenomenon is highlighted. Specific rheological models based on metallurgy are introduced. Finally, shear tests on hat shaped specimens are performed to reach higher strain rates.

Effect of Phase Transformation on the Wear Behavior of NiTi Alloy

2010 ◽  
Vol 132 (3) ◽  
Author(s):  
M. Abedini ◽  
H. M. Ghasemi ◽  
M. Nili Ahmadabadi ◽  
R. Mahmudi
Keyword(s):  
Wear Behavior ◽  
Niti Alloy ◽  
Testing Temperature ◽  
Compression Tests ◽  
Scanning Calorimetry ◽  
Three Point Bending ◽  
Mechanical And Tribological Properties ◽  
Ni Alloy ◽  
Shape Memory Effects ◽  
Pin On Disk

In this paper, mechanical and tribological properties of a Ti-50.3 at % Ni alloy were investigated. The transformation temperatures of the alloy were determined using differential scanning calorimetry. Three-point bending tests were performed to characterize the pseudoelasticity and shape memory effects. Uni-axial compression tests were also performed at different testing temperatures. The wear tests were conducted using a pin-on-disk tribometer at testing temperatures ranging from 0°C to 80°C. The wear results showed that with increasing the testing temperature from 0°C to 50°C, the wear of the alloy was decreased, which could be attributed to the higher pseudoelasticity of the alloy at a testing temperature of 50°C. The pseudoelasticity of the alloy decreased at a higher testing temperature of 80°C; however, its wear resistance increased considerably due to higher ultimate strength and work hardening.

scholarly journals Machinability and related properties of austempered ductile iron: A review

2018 ◽  
Vol 12 (4) ◽  
pp. 4180-4190
Author(s):  
Ananda Hegde ◽  
Sathyashankara Sharma ◽  
Gowri Shankar M. C
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Wear Resistance ◽  
Ductile Iron ◽  
High Hardness ◽  
Austempered Ductile Iron ◽  
Spheroidal Graphite ◽  
Light Weight ◽  
Sg Iron

When the ductile iron which is also known as Spheroidal Graphite (SG) iron, is subjected to austempering heat treatment, the material is known as austempered ductile iron (ADI). This material has good mechanical properties and has various applications in different fields. This revolutionary material with its excellent combination of strength, ductility, toughness and wear resistance has the potential to replace some of the commonly used conventional materials such as steel, aluminium and other light weight alloys as it offers production advantage as well. One of the problems encountered during manufacturing is machining of ADI parts owing to its high hardness and wear resistance. Many researchers over a period of time have reported the machinability aspects of the ADI. This paper presents a review on the developments made on the machinability aspects of ADI along with other mechanical properties.

Influence of mineralogy and moisture content on plasticity and induced anisotropic damage of a claystone; application to nuclear waste disposals

2000 ◽  
Vol 171 (6) ◽  
pp. 621-627 ◽  
Author(s):  
Anne-Sophie Chiarelli ◽  
Beatrice Ledesert ◽  
Malek Sibai ◽  
Mohammed Karami ◽  
Nasser Hoteit
Keyword(s):  
Moisture Content ◽  
Nuclear Waste ◽  
Mechanical Behaviour ◽  
Triaxial Compression ◽  
Anisotropic Damage ◽  
Compression Tests ◽  
Two Factors ◽  
Triaxial Compression Tests ◽  
The Way

Abstract The influence of mineralogy and moisture content on mechanical behaviour of a claystone rock is studied by the way of uniaxial and triaxial compression tests and microscopic observations. Some parameters characteristic of phenomena like plasticity and induced anisotropic damage are discussed as a function of these two factors. Rock behaviour becomes more brittle when calcite content grows or when clay or moisture content decreases. At the microlevel, plasticity is induced by slip of clay sheets and induced anisotropic damage appears by growth of oriented microcracks at the interface between grains and matrix.

scholarly journals Influence of Rare Earth on Dynamic Recrystallization Behavior of As-Cast 30Mn Steel

2018 ◽  
Vol 2018 ◽  
pp. 1-9
Author(s):  
Honghong Yan ◽  
Yong Hu ◽  
Dawen Zhao
Keyword(s):  
Rare Earth ◽  
Dynamic Recrystallization ◽  
Strain Rate Range ◽  
Compression Tests ◽  
Forming Process ◽  
Cast Slab ◽  
Forming Technology ◽  
Alloy Addition ◽  
Dynamic Recrystallization Behavior ◽  
Gleeble 3500

Based on casting-rolling compound forming process, the effect of rare earth on dynamic recrystallization (DRX) of as-cast 30Mn steel was investigated by the single-pass hot compression tests performed using a Gleeble-3500 thermomechanical simulator, and the deformation temperature range was 950°C–1150°C and strain rate range was 0.1–1 s−1. With the assistance of the process parameters, constitutive equations were used to obtain the activation energy and hot working equation. The dynamic recrystallization kinetics models of the tested steel were constructed. The results show that rare earth ferrosilicon alloy addition (0.2%, mass fraction) can delay the onset of DRX significantly and refine the hot deformation microstructures. All of the results indicate that the addition of rare earth into as-cast 30Mn steel is helpful to prepare excellent cast slab for the casting-rolling compound forming technology.

PREDICTION AND INVESTIGATION OF SURFACE ROUGHNESS WHILE TURNING SG IRON WITH CUBIC BORON NITRIDE (CBN) AND TUNGSTEN CARBIDE INSERTS

2017 ◽  
Vol 41 (1) ◽  
pp. 129-141 ◽  
Author(s):  
K.M. Kumar ◽  
P. Hariharan
Keyword(s):  
Surface Roughness ◽  
Boron Nitride ◽  
Tungsten Carbide ◽  
Cubic Boron Nitride ◽  
Cutting Speed ◽  
Depth Of Cut ◽  
Spheroidal Graphite ◽  
Surface Model ◽  
Sg Iron ◽  
The Impact

This work compares the effect of cubic boron nitride (CBN) and multilayer (TiCN+Al2O3+TiN) coated tungsten carbide (WC) tools during the turning of spheroidal graphite (SG) nodular iron. Nodular irons have more ductility which is required in mechanical components that demand high fatigue resistance like crankshafts, cam shafts, bearing caps and clutch housings. The impact of various process parameters like the depth of cut, cutting speed and feed on the surface roughness (Ra) of SG iron is studied and optimized using the response surface model. The chip morphology is also discussed for evaluation of the quality of the turned surface. The experimental outcomes reveal that the WC tool offers a high surface finish at the optimal combination of the cutting speed at 102 meter/minute, feed at 0.051 millimeter/revolution and depth of cut at 0.5 millimeter and that, for the CBN insert, at 245 meter/minute of cutting speed, 0.051 millimeter/revolution of feed and 0.75 millimeter of depth of cut.

scholarly journals TECHNOLOGICAL CHARACTERIZATION OF Mezilaurus itauba WOOD: APPLICATION AND MACHINING TESTS

FLORESTA ◽  
2020 ◽  
Vol 51 (1) ◽  
pp. 037
Author(s):  
Jaime Vieira Rodrigues ◽  
Felipe Manzoni Barbosa ◽  
Jaqueline Beatriz Brixner Dreyer ◽  
Luís Paulo Baldissera Schorr ◽  
Tarik Cuchi ◽  
...  
Keyword(s):  
Compression Tests ◽  
Forest Species ◽  
Wood Production ◽  
Shear Tests ◽  
Mean Values ◽  
Average Value ◽  
Elasticity Module ◽  
Application Potential ◽  
Technological Quality

Brazil has several forest species that can be used for sustainable wood production. However, finding materials with technological quality is still a challenge. Wood is an excellent building material, however, there are few studies that have investigated the technological characterization, machining and processing of these species, including Mezilaurus itauba (Meisn.) Taub. Ex Mez. Thus, this study aimed to evaluate the technical characteristics and application potential of M. itauba wood from two distinct commercial lots, by analyzing its mechanical properties and performing machining tests.  For this, static bending, dynamics and machining tests were carried out. The perpendicular compression tests of the evaluated fibers presented mean values of 9899.77 Mpa and 10670.74 Mpa for the elasticity module of lot 1 and lot 2, respectively. The average value observed for the L1 rupture module was 96.02 Mpa, while for L2 it was 113.85 Mpa. For the shear tests, low variation was observed between the specimens as well as between the evaluated lots. As for machining tests, M. itauba wood was classified as excellent for manufacturing furniture and internal openings. The M. itauba lots have acceptable mechanical strength, and the density is indicated for structural works, as well as for manufacturing furniture and interiors.

Effect of Molybdenum on Hot Deformation and Processing Maps of Austenitic Stainless Steels

2008 ◽  
Vol 575-578 ◽  
pp. 1076-1082 ◽  
Author(s):  
Ming Jia Wang ◽  
Shan Shan Long ◽  
Song Mei Mu ◽  
Yan Wang ◽  
Lei Chen
Keyword(s):  
Stainless Steels ◽  
Power Dissipation ◽  
Hot Deformation ◽  
Austenitic Stainless Steels ◽  
Recrystallization Temperature ◽  
Processing Maps ◽  
Recrystallization Behavior ◽  
Compression Tests ◽  
Deformation Stress ◽  
Gleeble 3500

In this paper, hot compression tests were carried out using a Gleeble-3500 simulator to establish the law of hot deformation and recrystallization behavior, and to generate the corresponding processing maps. The influence of Mo was also investigated by comparing the results of hot deformation in such steel. The addition of molybdenum to stainless steel slightly increases the hot deformation stress and recrystallization temperature, while reduces the efficiency of power dissipation η.

In Situ Shear Tests on Masonry Panels Strengthened with Fiber-Reinforced Mortar Repointing

2017 ◽  
Vol 747 ◽  
pp. 282-288
Author(s):  
Nicola Cavalagli ◽  
Massimiliano Gioffrè ◽  
Vittorio Gusella ◽  
Chiara Pepi ◽  
Bernie Baietti ◽  
...  
Keyword(s):  
Shear Strength ◽  
Local Information ◽  
Fiber Reinforced ◽  
Compression Tests ◽  
Shear Tests ◽  
In Situ Tests ◽  
Joint Shear Strength ◽  
Reinforced Masonry ◽  
Diagonal Compression

In this paper the effect of joints structural repointing on single-wythe brickwork masonry using a fiber-reinforced mortar is investigated. Changes in shear strength are evaluated by in-situ tests carried out both on unreinforced and reinforced masonry specimens. The masonry joint shear strength, according to the standard ASTM C 1513, gives local information, while diagonal compression tests provides information on the global masonry shear response. The comparison highlights a good performance in both local and global masonry response, where the shear strength increases.

Sign in / Sign up

Export Citation Format

Share Document