Effect of Fe Content on Hot Tearing of High-Strength Al-Mg-Si Alloy

2007 ◽  
Vol 539-543 ◽  
pp. 380-385 ◽  
Author(s):  
Hiromi Nagaum ◽  
Satoru Suzuki ◽  
T. Okane ◽  
T. Umeda
Keyword(s):  
Crack Initiation ◽  
Electromagnetic Induction ◽  
High Strength ◽  
Solidification Path ◽  
Hot Tearing ◽  
Temperature Range ◽  
Fe Content ◽  
Calculation Results ◽  
Electromagnetic Induction Heating ◽  
Calculation Software

The effect of Fe content on hot tearing of the high-strength Al-Mg-Si alloy was systematically investigated. In this study, a thermodynamic calculation software Thermo-Calc was used to calculate the solidification path under the non-equilibrium condition, and the mechanical properties of this alloy have also been investigated during solidification using an electromagnetic induction heating tensile machine. In order to confirm the calculation results of solidification path, a quenching test also was carried out. By using the Thermo-Calc, the sequence of crystallization, crystallization temperature of formed phases and their crystallized amount were systematically investigated for each alloy in which Fe content was changed. Furthermore, by comparing the fracture surfaces of the tensile testing sample and DC billet, the temperature range of crack initiation of the alloy was examined. Comparing the temperature range of crack initiation with the crystallization phase and its crystallization order, Fe content of high-strength Al-Mg-Si alloy influenced hot tearing significantly owing to the crystallization behavior of α(AlFeMn).

Effect of Fe Content on Hot Tearing of High-Strength Al-Mg-Si Alloy

2007 ◽  
pp. 380-385
Author(s):  
Hiromi Nagaum ◽  
Satoru Suzuki ◽  
T. Okane ◽  
T. Umeda
Keyword(s):  
High Strength ◽  
Hot Tearing ◽  
Fe Content

Analysis of the Crack Initiation at Non-Metallic Inclusions in High-Strength Steels

2012 ◽  
Vol 49 (8) ◽  
pp. 468-479 ◽  
Author(s):  
P. Grad ◽  
B. Reuscher ◽  
A. Brodyanski ◽  
M. Kopnarski ◽  
E. Kerscher
Keyword(s):  
Crack Initiation ◽  
High Strength Steels ◽  
High Strength ◽  
Metallic Inclusions

Dimensionamiento de un horno de fundición por inducción electromagnética y cálculo de los parámetros eléctricos

2019 ◽  
pp. 1-15
Author(s):  
Arnulfo Pérez-Pérez ◽  
Jorge Sergio Téllez-Martínez ◽  
Gregorio Hortelano-Capetillo ◽  
Jesús Israel Barraza-Fierro
Keyword(s):  
Induction Heating ◽  
Power Supply ◽  
Electromagnetic Induction ◽  
Cast Steel ◽  
Electrical Power ◽  
Heating System ◽  
Heating Time ◽  
Ferrous Alloys ◽  
Electromagnetic Induction Heating ◽  
Induction Heating System

In this work, the dimensions of a furnace for melting of ferrous alloys were determined. The furnace has an electromagnetic induction heating system. In addition, the parameters of electrical power supply such as frequency and power were calculated. A 5kg cast steel mass with a density of 7.81 kg / dm3 was proposed. This corresponds to a crucible volume of 0.641 dm3. The frequency was obtained from tables, which take into account the diameter of the crucible, and its value was 1 KHz. The energy consumption was determined with the heat required to bring the steel to the temperature of 1740 K, the energy losses through the walls, bottom and top of the crucible. This value was divided between the heating time (30 minutes) and resulted in a power of 4.5 KW. The development of the calculations shows that the induction heating is an efficient process and allows a fast melting of ferrous alloys.

Finite Element Analysis of Tianerya Trench-Buried Inverted Siphon

2013 ◽  
Vol 804 ◽  
pp. 320-324
Author(s):  
Xiang Zan Xie
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Finite Element Calculation ◽  
Construction Process ◽  
Element Calculation ◽  
Element Analysis ◽  
Operational Process ◽  
Inverted Siphon ◽  
Calculation Results ◽  
Calculation Software

This paper adopts universal finite element calculation software to carry out finite element analysis for Tianerya trench-buried inverted siphon. Researching variation law of the inverted siphons stress and displacement in construction process and operational process. The calculation results further shown design schemes rationality and safety. The analysis results provide a certain reference for design of trench-buried inverted siphon structure.

scholarly journals A Novel Shape Memory Plate Osteosynthesis for Noninvasive Modulation of Fixation Stiffness in a Rabbit Tibia Osteotomy Model

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Christian W. Müller ◽  
Ronny Pfeifer ◽  
Karen Meier ◽  
Sebastian Decker ◽  
Janin Reifenrath ◽  
...  
Keyword(s):  
Shape Memory ◽  
Induction Heating ◽  
Electromagnetic Induction ◽  
Plate Osteosynthesis ◽  
Bending Stiffness ◽  
Niti Sma ◽  
Additional Surgery ◽  
Rabbit Tibia ◽  
Electromagnetic Induction Heating

Nickel-titanium shape memory alloy (NiTi-SMA) implants might allow modulating fracture healing, changing their stiffness through alteration of both elastic modulus and cross-sectional shape by employing the shape memory effect (SME). Hypotheses: a novel NiTi-SMA plate stabilizes tibia osteotomies in rabbits. After noninvasive electromagnetic induction heating the alloy exhibits the SME and the plate changes towards higher stiffness (inverse dynamization) resulting in increased fixation stiffness and equal or better bony healing. In 14 rabbits, 1.0 mm tibia osteotomies were fixed with our experimental plate. Animals were randomised for control or induction heating at three weeks postoperatively. Repetitive X-ray imaging and in vivo measurements of bending stiffness were performed. After sacrifice at 8 weeks, macroscopic evaluation,µCT, and post mortem bending tests of the tibiae were carried out. One death and one early implant dislocation occurred. Following electromagnetic induction heating, radiographic and macroscopic changes of the implant proved successful SME activation. All osteotomies healed. In the treatment group, bending stiffness increased over time. Differences between groups were not significant. In conclusion, we demonstrated successful healing of rabbit tibia osteotomies using our novel NiTi-SMA plate. We demonstrated shape-changing SME in-vivo through transcutaneous electromagnetic induction heating. Thus, future orthopaedic implants could be modified without additional surgery.

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