Analysis of sintering and bonding of ultrafine WC powder and stainless steel by hot compaction diffusion bonding

Hasan, Mahadi; Zhao, Jingwei; Huang, Zhenyi; Chang, Li; Zhou, Haoruo; Jiang, Zhengyi

doi:10.1016/j.fusengdes.2018.05.076

Cited by 18 publications

(14 citation statements)

References 40 publications

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“…From the above image (Figure 6), it was clear that good bonding was formed at the interface of the bonded material accompanied by reaction and interdiffusion strains. The interparticle differences reduced as the temperature rises, which means that the bonded material's surface density is sensitive to the temperature described in the previous literature [30]. It can also be noted that two bonding interfaces, namely the SiaAlON interface and duplex stainless steel interface, confirm the success of diffusion bonding.…”

Section: Microstructure Analysismentioning

confidence: 54%

Investigation on the physical properties and diffusion layer phase transformation at the interface of Sialon-Duplex Stainless-Steel bonding

Rady

Hussain

Shaik

et al. 2021

JMES

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Joining SiALON to duplex stainless steel utilizes the properties of two materials which may provide an opportunity for distinctive applications. Ceramic is hard and operates at a high temperature but it is brittle whereas metal is tough but it can work at a low temperature. The benefits of the best properties of both materials can be utilized by joining them. The objectives of the research work are to investigate the physical properties and the phase transformation at the interface and at the inter-diffusion layer in between the SiAlON and duplex stainless steel. The experiment incorporated nitriding, then diffusion bonding the duplex stainless steel using the hot press. Bonding was carried out at 1200°C for the holding times of 30 minutes and 1 hour. Metallography and micro analyses were conducted to achieve the above objectives. The study has demonstrated that 30 minutes joining time is sufficient to develop the thickness of the interface. However, 1 hour joining duration achieved cohesive and sound diffusion bonding of the SiAlON to duplex stainless steel. This is possible due to the formation of diffusion interlayer which accommodates the residual stress presence during cooling down process.

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Section: Microstructure Analysismentioning

confidence: 54%

Investigation on the physical properties and diffusion layer phase transformation at the interface of Sialon-Duplex Stainless-Steel bonding

Rady

Hussain

Shaik

et al. 2021

JMES

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“…The sintering process of superalloy powder is divided into two stages, namely, the heating stage and the holding stage. The influence of temperature on the sintering process is mainly reflected in the holding stage [ 28 ]. Therefore, to ensure the consistency of the initial conditions in the holding stage, the electric current density and the pressure rise rate should be adjusted separately so that the superalloy reaches the same large porosity after the end of the heating stage.…”

Section: Resultsmentioning

confidence: 99%

Effect of Pressure and Temperature on Densification in Electric Field-Assisted Sintering of Inconel 718 Superalloy

Zhang

Meng

et al. 2021

Materials

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Electric field-assisted sintering has ubiquitous merits over conventional sintering technology for the fabrication of difficult-to-deform materials. To investigate the effect of sintering pressure and temperature on the densification of Inconel 718 superalloy, a numerical simulation model was established based on the Fleck-Kuhn-McMeeking (FKM) and Gurson-Tvergaard-Needleman (GTN) models, which covers a wide range of porosity. At a sintering pressure below 50 MPa or a sintering temperature below 950 °C, the average porosity of the sintered superalloy is over 0.17 with low densification. Under a pressure above 110 MPa and a temperature above 1250 °C, the sintered superalloy quickly completes densification and enters the plastic yield stage, making it difficult to control the sintering process. When the pressure is above 70 MPa while the temperature exceeds 1150 °C, the average porosity is 0.11, with little fall when the pressure or temperature rises. The experimental results indicated that the relative density of the sintered superalloy under 70 MPa and 1150 °C is 94.46%, and the proportion of the grain size below 10 μm is 73%. In addition, the yield strength of the sintered sample is 512 MPa, the compressive strength comes to 1260 MPa when the strain is over 0.8, and the microhardness is 395 Hv, demonstrating a better mechanical property than the conventional superalloy.

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“…The stress can be expressed both in principal Cauchy stress or nonprincipal Cauchy stress that can be seen in Eqs. ( 1) and (2). In those equations σ is Equivalent von Mises stress, σ1, σ2, σ3 are principal Cauchy stresses, σx, σy, σz, τxy, τxz, τyz, are nonprincipal Cauchy stresses, shear and normal stresses.…”

Section: Materials Modelmentioning

confidence: 99%

“…Particles were re-arranging in the beginning of the compaction in other words they try to move other positions in order to fill the voids of die. The rearranging can be seen in most compaction analyses [2,4,30]. Especially, brittle material particles may deform or fracture before the final stage.…”

Section: Fig 6 Trends Of Equivalent Von Mises Stress Via Die Height Varying Compaction Velocitiesmentioning

confidence: 99%

“…Especially, production of complex shaped and miniature parts by Powder Metallurgy (PM) are (known to be) more advantageous in terms of high production rates, costeffectiveness, net shape qualities, (efficient use of materials), and easy operation opportunities [1]. Metal powder compaction parts are usually uniaxial MIM or PIM processed parts [2,3].…”

Section: Introductionmentioning

confidence: 99%

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Numerical Investigation of AISI 4140 Powder High Relative Density Compaction In Terms of Compaction Velocity

Güner

2020

mech

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In this study high relative density compaction of AISI 4140 steel powder compaction numerically investigated via different compaction velocities using Multi Particle Finite Element Method (MPFEM). 2D Analyses performed by three different particle geometry; 25µm, 35µm and 45µm in radius. Particle size effect also investigated via high relative density and compaction velocity. von Mises Power law evaluated for AISI 4140 steel powder and utilized to analysis. Results were plotted both in visually and graphically in aim to show effect of relative density, particle size, contact interactions and compaction velocity. The stress distribution through the height of die revealed out. A four-fold increase in compaction velocity increase the Equivalent von Mises stress 2% where the stress value can reach up to 3 times the yield stress. Stress values along the punch to the bottom of the die show a parabolic tendency with compaction velocity increase.

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Analysis of sintering and bonding of ultrafine WC powder and stainless steel by hot compaction diffusion bonding

Abstract: Analysis of sintering and bonding of ultrafine WC powder and stainless steel by Analysis of sintering and bonding of ultrafine WC powder and stainless steel by hot compaction diffusion bonding hot compaction diffusion bonding

Cited by 18 publications

References 40 publications

Investigation on the physical properties and diffusion layer phase transformation at the interface of Sialon-Duplex Stainless-Steel bonding

Investigation on the physical properties and diffusion layer phase transformation at the interface of Sialon-Duplex Stainless-Steel bonding

Effect of Pressure and Temperature on Densification in Electric Field-Assisted Sintering of Inconel 718 Superalloy

Numerical Investigation of AISI 4140 Powder High Relative Density Compaction In Terms of Compaction Velocity

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