Thermal Analysis of the Chip Formation in Austenitic Stainless Steel

Chagas, Gil Magno Portal; Barbosa, Patrícia Alves; Barbosa, Celso Antonio; Machado, Izabel Fernanda

doi:10.1016/j.procir.2013.06.105

Cited by 20 publications

(10 citation statements)

References 18 publications

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“…Another reason to explain the difference between thermal conductivity in samples with fibres and shavings is the composition of the waste steel. Chagas et al [33] found that the austenitic steel of the shavings used in this research has a lower thermal conductivity than the low-carbon steel of the fibres [32], resulting in the lower ability to transfer heat in mixtures with shavings, compared to mixtures with steel fibres.…”

Section: Effect Of the Metallic Waste On The Electrical Resistivity Omentioning

confidence: 73%

Effect of metallic waste addition on the electrical, thermophysical and microwave crack-healing properties of asphalt mixtures

Norambuena-Contreras

González

Concha

et al. 2018

Construction and Building Materials

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Effect of metallic waste addition on the electrical, thermophysical and microwave crackhealing properties of asphalt mixtures Norambuena-Contreras, J.; Gonzalez, A.; Concha, J. L.; Gonzalez-Torre, I.; Schlangen, E. h i g h l i g h t sFibres and shavings from metallic waste were added in asphalt mixtures. Electrical, thermophysical and microwave crack-healing properties of asphalt were evaluated. CT-Scan results showed that shavings were crushed during asphalt mixing process. Metallic waste addition did not improve thermal and electrical properties. Healing levels after microwave heating times of 40 s twice those obtained after 30 s. a b s t r a c tThis paper aims to evaluate the effect of metallic waste addition on the electrical, thermophysical and microwave crack-healing properties of asphalt mixtures. With this purpose, asphalt mixtures with two different types of metallic waste, steel wool fibres and steel shavings, added in four different contents, were tested. Electrical and thermophysical properties of asphalt mixture specimens with, and without, metallic waste were measured. The spatial distribution of the metallic waste inside the asphalt mixture samples was evaluated by using X-ray computed tomography. In addition, crack-healing properties of asphalt samples using microwave radiation heating were assessed at two different healing times, 30 s and 40 s. To quantify the efficiency of the healing process, five healing cycles were carried out for each asphalt sample. The main results showed that asphalt mixtures with shavings presented lower air void contents than mixtures with fibres. Moreover, fibres produced an increase in the electrical conductivity of the mixtures because long fibres in the mixtures form electrically conductive channels. In contrast, shavings did not have significant effect on the electrical properties of the mixtures. Likewise, it was proven that metallic waste reduced the thermal conductivity and the specific heat capacity of asphalt mixtures. Conversely, shavings decreased the thermal diffusivity of asphalt mixtures regardless of their content. Overall, it was found that the healing level reached by the asphalt mixtures tested by microwave radiation depends on the healing time and the type and content of metallic waste used. CT-scans results proved that the spatial distribution of metallic waste inside the asphalt mixture samples was not uniform and played an important role in the asphalt self-healing properties using microwave radiation heating.

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Section: Effect Of the Metallic Waste On The Electrical Resistivity Omentioning

confidence: 73%

Effect of metallic waste addition on the electrical, thermophysical and microwave crack-healing properties of asphalt mixtures

Norambuena-Contreras

González

Concha

et al. 2018

Construction and Building Materials

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“…During machining, there is an accumulation of stress into the produced chips due to the plastic deformation, heating, work hardening, etc., promoted by cutting process. The mechanism of serrated chips formation is not fully understood and two main theories have been proposed to explain the formation of this morphology, adiabatic shear theory and periodic fracture theory [30][31][32][33][34][35][36]. The formation of serrated chips is favored by using a tool with zero rake angle [33], as in our study.…”

Section: Morphology Of Manual Filed Magnesiummentioning

confidence: 56%

“…These chips have saw-toothed morphology with almost uniformly spaced segments. The flat side of the chip was formed by the contact with the cutting edge of the tool while the opposite side got a serrated feature [30][31]. Machined chips morphologies have been studied recently, especially for high-speed machining processes [32][33][34][35][36].…”

Section: Morphology Of Manual Filed Magnesiummentioning

confidence: 99%

Hydrogen storage in filed magnesium

Asselli

Santos

Huot

2016

Journal of Alloys and Compounds

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“…Md (30/50)°C is the temperature at which 50 % martensite is formed by 30 % true strain [12,26]. Hedayati et al [12] have formulated composition dependence of the Md temperature for different steels in the form of the following equation:…”

Section: Microstructurementioning

confidence: 99%

The Effect of Cold Rolling on Microstructure and Mechanical Properties of a New Cr–Mn Austenitic Stainless Steel in Comparison with AISI 316 Stainless Steel

Mahmoudiniya

Kheirandish

Asadiasadabad

2016

Trans Indian Inst Met

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In the present study the effect of room temperature rolling on microstructure and mechanical properties of a new Cr-Mn austenitic stainless steel (containing 12 %Cr, 23 %Mn and 0.13 %C) and AISI 316 steel was investigated. The specimens of these steels were cold rolled at various thickness reductions of 0, 12, 25, 37 and 50 %. Microstructural investigations were carried out using optical microscopy, magnetic field test and X-ray diffraction technique. Hardness and tensile test methods were also done to evaluate the mechanical properties. Results showed that some of austenite phase transformed to martensite during cold rolling in the 316 steel, while there was no strain induced transformation in the Cr-Mn steel. It was also found that the newly developed steel had higher strength and higher specific strength than those of the 316 steel, while its ductility was the same as that of the 316.

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Thermal Analysis of the Chip Formation in Austenitic Stainless Steel

Cited by 20 publications

References 18 publications

Effect of metallic waste addition on the electrical, thermophysical and microwave crack-healing properties of asphalt mixtures

Effect of metallic waste addition on the electrical, thermophysical and microwave crack-healing properties of asphalt mixtures

Hydrogen storage in filed magnesium

The Effect of Cold Rolling on Microstructure and Mechanical Properties of a New Cr–Mn Austenitic Stainless Steel in Comparison with AISI 316 Stainless Steel

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