Effects of Debinding and Sintering Atmosphere on Properties and Corrosion Resistance of Powder Injection Molded 316 L - Stainless Steel

Raza, Muhammad Qamar; Ahmad, Faiz; Muhamad, Norhamidi; Sulong, Abu Bakar; Omar,; Akhtar, Majid Niaz; Aslam, Muhammad; Sherazi, Irfan

doi:10.17576/jsm-2017-4602-13

Cited by 17 publications

(5 citation statements)

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“…Based on Raza et al . [ 72 ], carbon content influences the performance of corrosion resistance. The carbon content percentage for 61 vol.% sintered part at 1000°C, 1100°C, 1200°C and 1300°C for 1 hour, were measured.…”

Section: Resultsmentioning

confidence: 99%

Effect of sintering parameters on physical and mechanical properties of powder injection moulded stainless steel-hydroxyapatite composite

et al. 2018

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The combination of metallic bio-inert material, stainless-steel 316L (SS316L) and a bio-active material, hydroxyapatite (HA) can produce a composite which has superior properties for orthopaedic applications. The main objective of this study is to investigate the effects of sintering temperature and holding time on the physical and mechanical properties of the sintered part. 50wt.% SS316L and 50wt.% HA were mixed with a binder system of palm stearin (PS) and polyethylene (PE) at 61 vol.% powder loading. Rheological properties show a pseudo-plastic behaviour of the feedstock, where viscosity decreases with increasing shear rate. The feedstock was injection moulded into a tensile bar shape while thermal debinding was carried out at 320°C and 500°C. The brown parts were sintered at 1000, 1100, 1200 and 1300°C, with three different sintering times of 1, 3 and 5 hours in the furnace. It was found that the highest sintered density measured was 95.61% of the theoretical density. In addition, the highest hardness and Young’s modulus measured were 150.45 HV and 52.61 GPa respectively, which are higher than those of human bone. The lowest percentage of carbon content was 0.022wt.% given by the sample sintered at 1300°C for 1 hour. Therefore, SS316L/HA composite with good mechanical and physical properties was successfully produced through the PIM process.

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Section: Resultsmentioning

confidence: 99%

Effect of sintering parameters on physical and mechanical properties of powder injection moulded stainless steel-hydroxyapatite composite

et al. 2018

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“…The reason to employ nitrogen is in accordance with the aim to produce cost-efficient PIM parts (it is approximately five times cheaper than hydrogen). According to the previous studies [32], it provides samples of the highest strength, but leaves the part brittle with the ductility of only 15%. Mechanical properties of sintered samples depend also on temperature and length of sintering.…”

Section: Resultsmentioning

confidence: 99%

“…Overall, lower elongation values can be attributed to the sintering medium (nitrogen) as already mentioned above. Standard deviations of elongation are usually not provided for PIM sintered parts, e.g., [4,32], however they might provide important additional information about the number of defects in the final sintered structure. The variation in the elongation obtained for the speed 5 • C/min (26.7%) is similar to that obtained for additive manufactured 316L stainless steel parts by Natali et al [35].…”

Section: Resultsmentioning

confidence: 99%

“…The sintered density value ( Table 2) obtained for the speed of 5 • C/min corresponds to the relative density 93.7% of the pycnometric density. Generally, a structure of 316L steel is austenitic [2,3,32,36], however, martensite transformation may occur as a deformation-induced transformation. The behavior of austenitic stainless steel during deformation is dependent on the value of stacking fault energy (SFE) and temperature of the deformation.…”

Section: Resultsmentioning

confidence: 99%

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Environmentally Efficient 316L Stainless Steel Feedstocks for Powder Injection Molding

Hausnerová

Novák

2020

Polymers

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In this study, environmentally convenient highly metal powder filled feedstocks intended for powder injection molding is presented. The composition of 60 vol % 316L stainless steel gas atomized powder feedstocks containing semicrystalline waxes: acrawax or carnauba wax and paraffin wax, combined with polyethylene glycol and modifier, was optimized to provide defect-free parts. Rheological as well as thermogravimetric analyses supported with scanning electron microscopy and metallography were employed to set up optimum conditions for molding, debinding and sintering. The performance of the novel feedstock was compared with currently available polyolefines-based materials, and results showed an efficiency enhancement due to the substantially lower (about 100 °C) mixing and molding temperatures as well as a reduction of debinding and sintering times at the simultaneous achievement of better mechanical properties in terms of elongation and tensile strength, in comparison to the mass production feedstock.

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“…Sistem bahan pengikat memainkan peranan yang utama untuk melincirkan bahan suapan semasa proses pengacuan suntikan dijalankan dengan menyebarkan bahan serbuk secara seragam dan mengisi semua ruang antara zarah serbuk (Jamaludin et al 2015). Menurut Raza et al (2017), bahan pengikat bertindak sebagai kenderaan untuk membolehkan bahan serbuk mengalir ke dalam acuan dan memberikan kekuatan kepada bahagian yang dibentuk untuk membolehkan ia dikendalikan dengan mudah. Penghasilan jasad anum yang baik adalah penting kerana ia akan mempengaruhi sifat fizikal dan mekanik jasad tersinter.…”

Section: Pengenalanunclassified

Pengoptimuman Parameter Pengacuan Suntikan terhadap Ketumpatan Jasad Anum untuk Komposit Aloi Titanium-Wolastonit

Ramli¹,

Sulong²,

Muhamad³

et al. 2018

JSM

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Pembangunan bahan komposit aloi titanium (Ti6Al4V)/wolastonit (WA) semakin mendapat permintaan yang tinggi terutamanya dalam aplikasi implan tulang. Ti6Al4V adalah sejenis aloi logam yang terkenal dengan sifat mekanik yang tinggi dan bioserasi manakala seramik WA merupakan bahan biokaca yang bersifat bioaktif dan sesuai untuk dijadikan bahan implan. Proses pengacuan suntikan serbuk (PIM) adalah proses teknologi serbuk yang boleh menghasilkan jasad yang kecil dan berbentuk kompleks pada kos yang rendah. Ketumpatan jasad anum yang rendah boleh menyebabkan kecacatan seperti retakan berlaku semasa proses penyahikatan dan pensinteran dijalankan. Oleh itu, jasad anum yang optimum terhadap ketumpatan adalah penting bagi menghasilkan komposit yang mempunyai sifat mekanik dan fizikal yang baik. Kajian ini memberi tumpuan terhadap kesan parameter proses pengacuanan terhadap jasad anum komposit Ti6Al4V/WA. Nilai pembebanan serbuk ialah 67.0 % isi padu. Serbuk Ti6Al4V dan WA dengan nisbah peratus berat masing-masing adalah 90:10 dicampurkan bersama 60 % bt. stearin sawit (SS) dan 40% bt. polietilena (PE) untuk membentuk bahan suapan. Parameter optimum yang diperoleh bagi proses pengacuanan suntikan ditentukan melalui kaedah Taguchi berdasarkan ketumpatan jasad anum ialah: suhu penyuntikan pada 130°C, suhu acuan pada 50°C, tekanan penyuntikan pada 13 bar dan masa penyuntikan pada 10 s. Nilai purata ketumpatan tertinggi adalah 3.095 g/ cm 3. Analisis ANOVA menunjukkan suhu acuan memberikan pengaruh paling tinggi iaitu 57.63% bagi mendapatkan jasad anum yang mempunyai ketumpatan yang tinggi. Uji kaji pengesahan menunjukkan jasad anum yang terhasil berada dalam julat prestasi optimum yang dijangkakan. Penghasilan jasad anum yang bebas daripada kecacatan adalah penting bagi menentukan sifat mekanik dan fizikal yang baik pada jasad sinter.

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Effects of Debinding and Sintering Atmosphere on Properties and Corrosion Resistance of Powder Injection Molded 316 L - Stainless Steel

Cited by 17 publications

References 26 publications

Effect of sintering parameters on physical and mechanical properties of powder injection moulded stainless steel-hydroxyapatite composite

Effect of sintering parameters on physical and mechanical properties of powder injection moulded stainless steel-hydroxyapatite composite

Environmentally Efficient 316L Stainless Steel Feedstocks for Powder Injection Molding

Pengoptimuman Parameter Pengacuan Suntikan terhadap Ketumpatan Jasad Anum untuk Komposit Aloi Titanium-Wolastonit

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