“…Chandramouli et al [60] studied the hardness variation on welded sinter-forged steel based on the pre-alloyed Atomet 4601 steel, explained in Figure 10. Little variation in hardness values at the weld zone (WZ) and the heat-affected zone (HAZ) is in agreement with obseravation made by Correa [59] The high hardness at the WZ was due to the pore-free formation in the welding zone, caused by the melting and solidification of the material.…”
Section: Welding Behaviour Effect On the Microstructure And Mechanica...mentioning
confidence: 99%
“…Meanwhile, the density of the upset material was enhanced through pores closure and strain hardening. Figure 10 Plots of hardness values at various zones of weldment of welded alloy steel [60]. …”
Section: Welding Behaviour Effect On the Microstructure And Mechanica...mentioning
Powder metallurgy (PM) technology is an ideal manufacturing process to produce near net shape parts i.e. part that requires little or no machining, examples of PM processes are spark plasma sintering, isostatic pressing and additive manufacturing. PM allows maximisation of materials and produces part with optimised mechanical and physical properties. Also, PM process provides the possibility to further increase the industrial use of PM parts by fabricating it into complex geometrical shapes via joining. Joining is the most important mechanical process necessary for PM parts to perform in actual service conditions expected in automobile parts and structural parts. Despite apparent advantages of PM processes, joining PM parts has been a tedious process, due to challenges associated with inherent characteristics, like porosity, chemical composition and impurities like oil or grease, which tend to impair the weldments property. In this document, a review of PM process is presented, focusing on different welding methods that can be used to effectively join PM components.
“…Chandramouli et al [60] studied the hardness variation on welded sinter-forged steel based on the pre-alloyed Atomet 4601 steel, explained in Figure 10. Little variation in hardness values at the weld zone (WZ) and the heat-affected zone (HAZ) is in agreement with obseravation made by Correa [59] The high hardness at the WZ was due to the pore-free formation in the welding zone, caused by the melting and solidification of the material.…”
Section: Welding Behaviour Effect On the Microstructure And Mechanica...mentioning
confidence: 99%
“…Meanwhile, the density of the upset material was enhanced through pores closure and strain hardening. Figure 10 Plots of hardness values at various zones of weldment of welded alloy steel [60]. …”
Section: Welding Behaviour Effect On the Microstructure And Mechanica...mentioning
Powder metallurgy (PM) technology is an ideal manufacturing process to produce near net shape parts i.e. part that requires little or no machining, examples of PM processes are spark plasma sintering, isostatic pressing and additive manufacturing. PM allows maximisation of materials and produces part with optimised mechanical and physical properties. Also, PM process provides the possibility to further increase the industrial use of PM parts by fabricating it into complex geometrical shapes via joining. Joining is the most important mechanical process necessary for PM parts to perform in actual service conditions expected in automobile parts and structural parts. Despite apparent advantages of PM processes, joining PM parts has been a tedious process, due to challenges associated with inherent characteristics, like porosity, chemical composition and impurities like oil or grease, which tend to impair the weldments property. In this document, a review of PM process is presented, focusing on different welding methods that can be used to effectively join PM components.
“…during the sintering process, copper melts and penetrates into the neck region between the bonded iron particles by capillarity action and subsequently diffuses into ferrite. it is noteworthy that the influence of copper is more pronounced in the presence of carbon [27]. in addition, phosphorus as a common alloying element can significantly affect the liquid phase 1 QuCHan uniVerSiTy oF TeCHnology, FaCulTy oF engineering, deParTmenT oF induSTrial engineering, QuCHan, iran 2 QuCHan uniVerSiTy oF TeCHnology, engineering FaCulTy, deParTmenT oF meCHaniCal engineering, QuCHan, iran 3 reSearCH and deVeloPmenT (r&d) manager, maSHHad Powder meTallurgy, maSHHad, iran formation (during the sintering process) and microstructural and mechanical properties of the Fe-P-C steels [28].…”
And mechAnIcAl ProPerTIes of Powder meTAllurgy sTeelsan experimental study was performed to assess the influences of aluminum content on the porosity, microstructure and mechanical properties of powder metallurgy steels. optical microscope equipped with the image processing software and the scanning electron microscope were employed to study the microstructure of investigated specimens. in order to find mechanical properties of specimens, Vickers hardness and compression tests were conducted. By increasing the aluminum content (from 0 to 4 wt. %), the porosity increases (from 6.01% to 8.43%). The microstructure of specimens contains aluminum phase distributed between the boundaries of agglomerated iron particles, ferrite, and pearlite. By increasing the aluminum content, stress-strain curves shift significantly downwards, and the modulus of elasticity, elongation, yield stress, and Vickers hardness reduce from 1.82 to 0.86 gPa, 32.1 to 17.8%, 138.1 to 28.2 mPa, and 127.7 to 26.8 HV, respectively.
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