Sintering densification and microstructural evolution of injection molding grade 17-4 PH stainless steel powder

Wu, Yixian; Blaine, Debby; Schlaefer, Connie; Marx, Brian M.; German, Randall M.

doi:10.1007/s11661-002-0050-4

Cited by 60 publications

(53 citation statements)

References 6 publications

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“…However, it is present in very low amounts that are nearly impossible to visualize by optical microscopy. These constituents were already discussed in the literature by Wu et al 8,10 in their two studies.…”

Section: Materials Characterisation and Discussionmentioning

confidence: 75%

Plasma debinding and sintering of metal injection moulded 17-4PH stainless steel

et al. 2011

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In this work, 17-4PH stainless steel parts processed in a Plasma Assisted Debinding and Sintering (PADS) furnace were characterised in terms of microstructure, final density, microhardness, carbon content and tensile behaviour. To determine whether these properties were satisfactory, the same characterisation procedure was conducted on the parts processed by conventional batch furnaces that are normally employed in Metal Injection Moulding industrial plants. The properties were in good agreement, and only slight differences like an extremely low carbon content (0.003% w/o) were observed. It has been seen that not only economical advances but also intricate materials with suitable responses may be obtained using PADS.

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Section: Materials Characterisation and Discussionmentioning

confidence: 75%

Plasma debinding and sintering of metal injection moulded 17-4PH stainless steel

et al. 2011

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“…1; both were taken by quenching injection molded 17-4 PH stainless steel compacts during heating. 3 As sintering progresses, surface area declines while density increases, in this case from 73% to 91%. Grain boundaries form in the contacts, and over time grain size increases with densification while surface area declines.…”

Section: Introductionmentioning

confidence: 97%

Sintering Trajectories: Description on How Density, Surface Area, and Grain Size Change

German

2016

JOM

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Sintering is a mainstay production step in forming metal, ceramic, polymer, and composite components from particles. Since the 1940s, the sintering process is treated using a matrix of mathematical relationships that include at least seven atomic transport mechanisms, several options on powder characteristics, and three pore-grain morphology options. The interplay of these relationships is handled by numerical solutions to predict property development. An alternative approach is to track the sintering trajectory using relatively simple relationships based on bulk measures. Energy minimization dictates that initial stage sintering acts to reduce surface area. In late stage sintering, the energy minimization turns to grain boundary area reduction via grain growth. Accordingly, relationships result between density, surface area, and grain size, which largely ignore mechanistic details. These relationships are applicable to a wide variety of materials and consolidation conditions, including hot pressing, and spark sintering.

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“…[1][2][3][4][5][6][7][8][9][10][11][12] The PIM is composed of several processes, in which fine powders are mixed with binders, the mixed powders are injected into a mold, binders are removed from the injection-molded body, and only powders are sintered at high temperatures. Recently, intensive studies on the PIM have been conducted because of its designing freedom.…”

Section: Introductionmentioning

confidence: 99%

Correlation of Microstructure with Hardness, Wear Resistance, and Corrosion Resistance of Powder-Injection-Molded Specimens of Fe-Alloy Powders

Son

Yoon²,

Lee

2009

Metall Mater Trans A

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In this study, the powder injection molding (PIM) process was applied to Fe-alloy powders. Microstructure, hardness, wear resistance, and corrosion resistance of the PIM specimens were analyzed and compared with those of a conventional stainless steel, SS316L. When Fe-alloy powders were injection molded and then sintered at 1200°C or 1250°C, completely densified specimens with almost no pores were obtained. They contained 63 to 80 vol pct of hard (Cr,Fe) 2 B dispersed in the austenite or martensite matrix. Since these (Cr,Fe) 2 B borides were very hard, thermally stable, and corrosion resistant, hardness, high-temperature hardness, wear resistance, and corrosion resistance of the PIM specimens of Fe-alloy powders were 2 to 5 times as high as those of the stainless steel. Such property improvement suggested new applicability of the PIM products of Fe-alloy powders to structures and parts requiring excellent mechanical properties.

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Sintering densification and microstructural evolution of injection molding grade 17-4 PH stainless steel powder

Cited by 60 publications

References 6 publications

Plasma debinding and sintering of metal injection moulded 17-4PH stainless steel

Plasma debinding and sintering of metal injection moulded 17-4PH stainless steel

Sintering Trajectories: Description on How Density, Surface Area, and Grain Size Change

Correlation of Microstructure with Hardness, Wear Resistance, and Corrosion Resistance of Powder-Injection-Molded Specimens of Fe-Alloy Powders

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