Characteristics of hot ductility and fracture in micro

Characteristics of hot ductility and fracture in micro

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Microstructural Evolution in the HAZ of Inconel 718 and Correlation with the Hot Ductility

Microstructural Evolution in the HAZ of Inconel 718 and Correlation with the Hot Ductility Test The results of hot ductility tests indicate that heat treatment significantly alters the hot cracking susceptibility of alloy 718 BY R. G. THOMPSON AND S. GENCULU

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Materials Free Full-Text Effect of Boron on Hot

Effect of boron on the hot ductility and room-temperature tensile properties of Ti-Nb-microalloyed steels containing 0.071 wt.% carbon was studied. The thermal stress and thermal strain of continuous casting billets during cooling were simulated via hot tensile tests ...

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Fracture Mechanics - YouTube

12/9/2018· 21:11 general characteristics of fracture in ceramics 24:50 general characteristics of polymer fracture 26:18 impact fracture testing and ductile to brittle transition 28:39 fatigue and cyclic ...

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Fracture Types: 2 Main Types of Fracture in Metals

This leads to the formation of very tiny micro-voids by decohesion at matrix-particle interface as illustrated in Fig. 15.4 (a) at MnS inclusions in steel during hot-rolling. Microvoids can also form by the cracking of brittle particles as illustrated in Fig. 15.4 (b) when

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1 Characteristics of Metal Forming - Assets

1 Characteristics of Metal Forming Metal forming is one manufacturing method among many. In order to manufacture a machine component, such as a wheel suspension arm for a car, one can choose metal forming, casting, or machining as the shaping method.

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Tensile mechanical properties, constitutive parameters and fracture characteristics

1 Tensile mechanical properties, constitutive parameters and fracture characteristics of an as-cast AA7050 alloy in the near-solidus temperature regime T. Subroto1,2, A. Miroux1,2, D. G. Eskin3,4,* and L. Katgerman2 1) Materials innovation institute (M2i

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The Physical Metallurgy of Fracture - 1st Edition

The papers review the state of the art with respect to the physical metallurgy of fracture in a wide range of materials such as metals, alloys, and structural steels. This volume is comprised of 85 chapters and opens by discussing the effect of grain size on the

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Effects of initial microstructures on hot tensile

In order to study the initial microstructures on the hot tensile properties and fracture characteristics of Ti-6Al-4V alloy, the cylindrical tensile samples were first prepared according to ISO 6892-2 .The detailed dimensions of tensile samples are shown in Fig. 1a.Based ...

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EFFECT OF ALLOYING ON ELECTRONIC STRUCTURE, STRENGTH AND DUCTILITY CHARACTERISTICS

EFFECT OF ALLOYING ON ELECTRONIC STRUCTURE, STRENGTH AND DUCTILITY CHARACTERISTICS OF NICKEL ALUMINIDE A.I. Kovalev, D.L. Wainstein. Surface Phenomena Researches Group, CNIICHERMET, Moscow, Russia. E-mail: [email protected]

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Ductility - Strength of Materials

Ductile materials show large deformation before fracture. The lack of ductility is often termed brittleness. Usually, if two materials have the same strength and hardness, the one that has the higher ductility is more desirable. The ductility of many metals can will

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[PDF] HOT DUCTILITY OF MICROALLOYED STEELS

The loss in ductility experienced by microalloyed steels at temperatures generally ranging from 700 to 1100°C is a widely studied subject in steel research. The hot ductility behaviour of steels is usually measured through the reduction of area of the samples after hot tensile tests performed up to fracture. The so-called standard hot ductility curves are then obtained by testing the steel at ...

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Tensile Deformation and Fracture Behaviors of a Nickel

2/8/2019· This implies that the superalloy with a small size and low volume fraction of γ and γ phases could tolerate higher damage before fracture. It could be concluded that the fracture mode was ductile fracture. Additionally, tearing edges (Figure 10 f) and serpentine h).

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Influence of Thermal History on the Hot Ductility of Ti

Abstract: The hot ductility of Ti-Nb microalloyed steel has been investigated to evaluate the sensitivity to surface crack formation during the continuous casting process. [3] B. Mintz, Importance of Ar3 temperature in controlling ductility and width of hot ductility trough in steels, and its relationship to transverse cracking, Mater. ...

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Effect of Boron on Hot Ductility and Room-Temperature

17/7/2019· Effect of boron on the hot ductility and room-temperature tensile properties of Ti-Nb-microalloyed steels containing 0.071 wt.% carbon was studied. The thermal stress and thermal strain of continuous casting billets during cooling were simulated via hot tensile tests ...

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Properties of Reinforcing Steels

Micro-alloy. This is characterised by having a high work hardening rate, and a high level of elongation. The R m/R e figure is particularly high for these steels, and they have a relatively high level of ductility. The curve shows a discontinuous yielding normally be

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Hot ductility and fracture mechanisms of a C-Mn-Nb-Al

Characteristics of Hot Ductility and Fracture in Micro-Alloyed Q345B Structural Steel February 2011 ... The hot ductility and fracture behaviour of a C-Mn steel susceptible to transversal cracking ...

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Hot ductility behaviour of high manganese steels with

The influence of aluminium on the hot ductility of high manganese steels between 700 C and Tliq has been examined, using the hot tensile test machine. Five materials with 17 wt-% [Mn], 0.3 wt-% [C] and 08 wt-% [Al] were cast. To detect the cause of cracking ...

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Strength and ductility with {10 ͞ 11} {10 ͞ 12} double

Cizek, P. & Barnett, M. R. Characteristics of the contraction twins formed close to the fracture surface in Mg3Al1Zn alloy deformed in tension. Scr. Mater. 59 , 959962 (2008).

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Micro-cracking of Concrete / Behavior under Multiaxial Loading

Micro-cracking of Concrete / Behavior under Multiaxial Loading Strength properties of concrete o Concrete is a complex material consisting of coarse aggregate, sand, cement gel, unhydrated cement particles, capillary and gel pores, pore water, air voids etc.

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Hot Ductility Behavior of 800MPa Ultra High Strength

The hot ductility behavior of 800MPa ultra high strength niobium containing steels has been investigated with Gleeble3500 hot simulator. Tensile test was carried out at 650 C1300 C at a constant true strain rate of 0.001 s1. Experimental results showed that steel A ...

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Effects of initial microstructures on serrated flow features

Uniaxial tensile tests are performed on a nickel-based superalloy at 473 K973 K and low strain rates. Effects of initial microstructures on serrated flow features, and fracture characteristics are analyzed. The dislocation across slip in the matrix is responsible for

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Microstructural analysis of ductility and fracture in fine

Microstructural analysis of ductility and fracture in fine-grained and ultrafine-grained vanadium-added DP1300 steels ... micro-cracks and occurrence of fracture. As Fig. 10(c) illustrates, void average area was much smaller in the V-added steel which has a 4.4.2. ...

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Investigating the Effect of Aggregate Characteristics on

22/8/2019· Sun and Ren [] investigated the fracture characteristics of asphalt concrete in Mixed-Loading Mode at low temperature. Results showed that the localized fracture showed the crack path was formed by bridging the initiated interfacial micro-cracks and, meanwhile

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STRUCTURAL AND FRACTURE CHARACTERISTICS OF NICKEL

15. - 17. 5. 2013, Brno, Czech Republic, EU STRUCTURAL AND FRACTURE CHARACTERISTICS OF NICKEL-BASED ALLOYS Jitka MALCHARCZIKOVÁ a, Vít MICHENKA b, Martin POHLUDKA a, David KAŇÁK b, René FRIDRICHb a VŠB-TU Ostrava, 17. listopadu 15/2172, 708 33 Ostrava -

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Influence of Thermal History on the Hot Ductility of a

The hot ductility of a low alloyed Cr-Mo steel has been investigated to evaluate the surface cracking sensitivity within the straightening or unbending regime during the continuous casting process. Tensile samples were subjected to various thermal treatments, including melting and solidification, and were tested at deforming temperatures ranging between 600 and 1100 °C using a strain ...

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Characteristics of Hot Ductility and Fracture in Micro

Hot-ductility tests of the microalloyed Q345B structural steel were performed in a tensile machine of Gleeble-1500D at different strain rates of 1.510-3/s 2.510-3/s and 210-2/s ...

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Hot Ductility Study of HAYNES® 282® Superalloy

Hot Ductility Study of HAYNES® 282® Superalloy Joel Andersson1, 2, Göran Sjöberg1, 2 and Mahesh Chaturvedi3 1Volvo Aero Corporation Materials Technology Department, Trollhättan, 461 81, Sweden 2Chalmers University of Technology, Department of Materials and Manufacturing Technology,

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Materials Microstructure and properties

heat treatment temperature. The fracture surface shows a mixture of brittle intergranular fracture and ductile shear fracture, s. fig. above. Impurity level Ductility is also influenced by impurity elements, especially by the Fe-content. This is true for wrought as

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High-entropy Al0.3CoCrFeNi alloy fibers with high tensile

The fracture-surface morphology from samples tested at 298 K is shown in Fig. 9bd, while Fig. 9eg show fracture morphologies of samples tested at 77 K. All samples exhibited ductile fracture morphologies and micro-void coalescence (MVC), consistent with.

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Effects of B on the Hot Ductility of Fe-36Ni Invar Alloy :

25/2/2019· AbstractThis work conducted systematic studies on the effect of B on the hot ductility behavior of Fe-36Ni alloy over the temperature range of 9001,200 C by use of Gleeble-3500 thermal simulator, Thermo-Calc software, transmission electron microscopy and ...

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Ductile vs. brittle fracture - people.ia.EDU

MSE 2090: Introduction to Materials Science Chapter 8, Failure 10 Stress Concentration where σ0 is the applied external stress, a is the half-length of the crack, and ρt the radius of curvature of the crack tip. (note that a is half-length of the internal flaw, but the full

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Hot Ductility and Deformation Behavior of C-Mn/Nb

Hot ductility studies have been performed on C-Mn and C-Mn-Nb steels with an approach to simulate the effect of cooling conditions experienced by steel in secondary cooling zone during continuous casting. Thermal oscillations prior to tensile straining deteriorate ...

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