Thermal Fatigue of Die-Casting Dies: An Overview

Abdulhadi, Hassan A.; Aqida, S. N.; Ishak, M.; Mohammed, Ghusoon Ridha

doi:10.1051/matecconf/20167400032

Cited by 21 publications

(10 citation statements)

References 28 publications

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“…Knowledge about microstructural evolution of such kind of steels, as well as the result of thermal history, is fundamental to achieve the expected mechanical behavior and corrosion resistance. The time-temperature history, derived from industrial heat treatments or welding processes [141][142][143], may lead to precipitation of various compounds (e.g., chromium carbides and nitrides) and some other intermetallic phases (e.g., σ phase). The formation of such compounds leads to losses in both corrosion resistance and fracture toughness [144].…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Effects of Heat Input on Microstructure, Corrosion and Mechanical Characteristics of Welded Austenitic and Duplex Stainless Steels: A Review

Mohammed

Ishak

Aqida

et al. 2017

Metals

105

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Abstract:The effects of input heat of different welding processes on the microstructure, corrosion, and mechanical characteristics of welded duplex stainless steel (DSS) are reviewed. Austenitic stainless steel (ASS) is welded using low-heat inputs. However, owing to differences in the physical metallurgy between ASS and DSS, low-heat inputs should be avoided for DSS. This review highlights the differences in solidification mode and transformation characteristics between ASS and DSS with regard to the heat input in welding processes. Specifically, many studies about the effects of heat energy input in welding process on the pitting corrosion, intergranular stress, stress-corrosion cracking, and mechanical properties of weldments of DSS are reviewed.

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Section: Mechanical Propertiesmentioning

confidence: 99%

Effects of Heat Input on Microstructure, Corrosion and Mechanical Characteristics of Welded Austenitic and Duplex Stainless Steels: A Review

Mohammed

Ishak

Aqida

et al. 2017

Metals

105

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“…The thermal fatigue damage is a function of thermal gradient and thermal expansion coefficient of the material. According to Abdulhadi et al [18], compression stresses developed exceed the elastic limit of the die material only if the integration of the temperature gradient and the widespread thermal expansion is high enough. In the present case, when the coolant channel position is increased from 0.5 to 1 mm, there is no considerable change in temperature distribution (figure 5b) and hence thermal gradient does not contribute for increase in fatigue damage.…”

Section: Effect Of Coolant Channel Position On Fatigue Damagementioning

confidence: 99%

Thermal fatigue analysis of H13 steel die adopted in pressure-die-casting process

Girisha¹,

Joshi²,

Kirthan³

et al. 2019

Sādhanā

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The thermal fatigue of die casting die steels causes reduction in tool life and seriously affects the surface conditions such as microstructure, hardness, surface finish and residual stresses. The improvement of die life by suitably modifying the die design assumes utmost importance for die designers. In this regard, a key issue is the size and location of cooling channels relative to the surface of the die, which affect the thermal stresses and fatigue life of dies. This paper focuses on thermal fatigue analysis of pressure-die-casting die steel H13 and analyses the effect of coolant channel location on temperature distribution and fatigue parameters such as life, damage, equivalent alternating stress and biaxiality using ANSYS Workbench 15.0 finite-element package. Increase in wall thickness (location of coolant channel from base) caused an increase in temperature and decrease in die life, which led to increase in volume porosity and hence crack initiation. The optimum coolant channel location from the base is obtained as 1 mm, which corresponds to minimum normal stress of 149.1 MPa, fatigue life of 4.1 9 10 5 cycles, fatigue damage of 2436.9 and equivalent alternating stress of 100.62 MPa.

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“…Carbon nanotubes have been expected as the perfect material to increase the properties of solid materials owing to their strength, high elastic modulus, and aspect ratio. Several types of research have shown that incorporating CNTs into metals, ceramics, and polymers can dramatically enhance their mechanical properties [9][10][11][12][13]. Multi-walled carbon nanotubes are one of the best materials that can be used as reinforcement materials due to its excellent properties [10,14].…”

Section: Introductionmentioning

confidence: 99%

Influence of Multiwall Carbon Nanotube on mechanical and wear properties of Copper – Iron composite

Hammood

Irhayyim

Awad³

et al. 2020

IJAME

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Multiwall Carbon nanotubes (MWCNTs) are frequently attractive due to their novel physical and chemical characteristics, as well as their larger aspect ratio and higher conductivity. Therefore, MWCNTs can allow tremendous possibilities for the improvement of the necessarily unique composite materials system. The present work deals with the fabrication of Cu-Fe/CNTs hybrid composites manufactured by powder metallurgy techniques. Copper powder with 10 vol. % of iron powder and different volume fractions of Multi-Wall Carbon Nanotubes (MWCNTs) were mixed to get hybrid composites. The hybrid composites were fabricated by adding 0.3, 0.6, 0.9, and 1.2 vol.% of MWCNTs to Cu- 10% Fe mixture using a mechanical mixer. The samples were compressed under a load of 700 MPa using a hydraulic press to compact the samples. Sintering was done at 900°C for 2 h at 5ºC/min heating rate. The microscopic structure was studied using a Scanning Electron Microscope (SEM). The effect of CNTs on the mechanical and wear properties, such as micro-hardness, dry sliding wear, density, and porosity were studied in detail. The wear tests were carried out at a fixed time of 20 minutes while the applied loads were varied (5, 10, 15, and 20 N). SEM images revealed that CNTs were uniformly distributed with relative agglomeration within the Cu/Fe matrix. The results showed that the hardness, density, and wear rates decreased while the percentage of porosity increased with increasing the CNT volume fraction. Furthermore, the wear rate for all the CNTs contents increased with the applied load.

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Thermal Fatigue of Die-Casting Dies: An Overview

Cited by 21 publications

References 28 publications

Effects of Heat Input on Microstructure, Corrosion and Mechanical Characteristics of Welded Austenitic and Duplex Stainless Steels: A Review

Effects of Heat Input on Microstructure, Corrosion and Mechanical Characteristics of Welded Austenitic and Duplex Stainless Steels: A Review

Thermal fatigue analysis of H13 steel die adopted in pressure-die-casting process

Influence of Multiwall Carbon Nanotube on mechanical and wear properties of Copper – Iron composite

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