Search results for: Jayant Jain

Items from 1 to 15 out of 15 results

article

Reinforcing the Near Eutectic Aluminum–Silicon Alloy with Graphene: An Approach toward Self‐Lubricating Composite

Harprabhjot Singh, Sanjeet Kumar, Deepak Kumar, Mayank Srivastav, more

Advanced Engineering Materials > 23 > 3 > n/a - n/a

Mechanical and physical properties of aluminum alloys make them suitable for automotive and other structural applications. The high silicon content in aluminum improves the hardness to a great extent but at the cost of ductility. Herein, the reinforcement of near eutectic Al–Si (ADC12) alloy with the reduced graphene oxide (rGO) is demonstrated. The ADC12 alloy and its composite with rGO are cast...

article

In Situ Study of Role of Microstructure on Antiwear Tribofilm Formation on AZ91 Magnesium Alloy under Zinc Dialkyldithiophosphate Containing Lubricant

Deepak Kumar, Jayant Jain, Nitya Nand Gosvami

Advanced Engineering Materials > 22 > 8 > n/a - n/a

Herein, role of microstructure on friction and wear properties of as‐cast and aged AZ91 alloy is investigated using atomic force microscopy (AFM) in lubricated conditions. The lubricant contains commercial antiwear additive zinc dialkyldithiophosphate (ZDDP), which reduces wear via sliding‐induced antiwear tribofilm. The tribofilm growth is found to be highly sensitive to the local microstructure...

article

Study of Static Recrystallization Behavior of a Mg-6Al-3Sn Alloy

Gaurav Gaurav, R. Sarvesha, Sudhanshu S. Singh, Rajesh Prasad, more

Journal of Materials Engineering and Performance > 2019 > 28 > 6 > 3468-3477

In this study, the static recrystallization behavior of cold-rolled Mg-6Al-3Sn alloy has been studied during annealing in the temperature range of 200-400 °C. The role of Mg₁₇Al₁₂ precipitation during recrystallization is discerned. A significant drop in the grain size has been reported post-recrystallization. The results suggest that the recrystallization predominately started at the prior grain...

article

Dissolution Kinetics of Mg₁₇Al₁₂ Eutectic Phase and Its Effect on Corrosion Behavior of As-Cast AZ80 Magnesium Alloy

Kondababu Kadali, Dhananjay Dubey, R. Sarvesha, Harikrishna Kancharla, more

JOM > 2019 > 71 > 7 > 2209-2218

Mg₁₇Al₁₂ eutectic phase strongly affects the mechanical and corrosion properties of AZ80 magnesium alloy. In this study, the dissolution kinetics of Mg₁₇Al₁₂ phase was evaluated at 420°C. The dissolution was found to follow the Johnson–Mehl–Avrami–Kolmogorov (JMAK) model with time exponent (n) of ~ 0.61, suggesting a decrease in the rate of dissolution of Mg₁₇Al₁₂ with time due to enrichment of aluminum...

article

Anisotropy in Nanoscale Friction and Wear of Precipitate Containing AZ91 Magnesium Alloy

Deepak Kumar, Jayant Jain, Nitya Nand Gosvami

Tribology Letters > 2019 > 67 > 2 > 1-8

In the present study, nanoscale friction and wear behavior of microstructure containing continuous precipitates (CPs) and discontinuous precipitates (DPs) in an aged AZ91 magnesium alloy has been evaluated using atomic force microscopy (AFM). The influence of sliding direction with respect to precipitate alignment on friction and wear response has been examined and is compared with pure magnesium...

article

Thermally sprayed alumina and ceria-doped-alumina coatings on AZ91 Mg alloy

Sanjeet Kumar, Arun Kumar, Deepak Kumar, Jayant Jain

Surface and Coatings Technology > 2017 > 332 > C > 533-541

Present study deals with the development of ceramic based coatings for Mg alloys using thermal spray technique, where Al₂O₃ is doped with CeO₂. Coatings characteristics and other responses are recorded using Nano-indenter, Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), X-ray Diffraction (XRD) and Tribometer. The tribological behavior is recorded in terms of specific wear...

article

Surface and interface characteristics of CeO2 doped Al2O3 coating on solution treated and peak aged AZ91 Mg alloy

Sanjeet Kumar, Deepak Kumar, Jayant Jain

Surface and Coatings Technology > 2017 > 332 > C > 511-521

The present study deals with the development of a ceramic based coating on AZ91 Mg alloy. D-gun thermal spray technique is used to deposit these coatings. The work is divided into two explorations; (i) the effect of substrate (AZ91 alloy) microstructure and (ii) the effect of CeO₂ doping in Al₂O₃ coating. The coating quality is judged by recording hardness (H), elastic modulus (E) and H/E ratio. The...

article

Influence of Zn Addition on Micro-scale Wear of Mg–xZn (x = 1–6 wt%) Alloys

Shishir Keerti, Aditya Gokhale, Jayant Jain, E.-Wen Huang

Tribology Letters > 2017 > 65 > 4 > 1-7

The effect of Zn addition on the scratch-induced wear response of Mg–xZn (x = 1–6 wt%) was investigated. The alloys were studied, at room temperature, for 100 and 400 mN loads in single-pass scratch and continuous scratch mode. Scanning electron microscope and optical profilometer were used to investigate the influence of load and continuous scratching on the wear and deformation mechanisms. The empirical...

article

Fatigue behavior of aged and solution treated AZ61 Mg alloy at small length scale using nanoindentation

Shubhra Jain, Aditya Gokhale, Jayant Jain, Sudhanshu S. Singh, more

Materials Science and Engineering: A > 2017 > 684 > C > 652-659

Nano indentation low cycle fatigue test has been performed in AZ61 Mg alloy to study the effect of cyclic loading. The cyclic load-depth curves are observed in aged and solution treated conditions. An indentation fatigue depth propagation law is used to analyze the cyclic behavior of the alloy. The increase in steady state depth propagation rate with increasing stress intensity has been reported which...

article

Time dependent ductility improvement of stainless steel SS 316 using stress relaxation

Krishnaswamy Hariharan, Prakash Dubey, Jayant Jain

Materials Science and Engineering: A > 2016 > 673 > C > 250-256

Plastic deformation of materials experience stress relaxation with time when stopped intermittently. The relaxation alters the ductility and the strain hardening behaviour during subsequent deformation due to the change in mobile dislocation density and internal stress. The prior studies on ductility improvement due to stress relaxation have focussed on multiple relaxation in the uniform deformation...

article

Model based phenomenological and experimental investigation of nanoindentation creep in pure Mg and AZ61 alloy

Kumar Sambhava, Pranjal Nautiyal, Jayant Jain

Materials & Design > 2016 > 105 > C > 142-151

In this study, nanoindentation induced creep in Mg metal system is investigated theoretically as well as experimentally. Analytical equations relating indentation creep rate to penetration depth for different creep deformation mechanisms were derived. The theoretical model was fitted with experimental results obtained for pure magnesium and AZ61 alloy. Dislocation glide was found to be the predominant...

article

Influence of loading path and precipitates on indentation creep behavior of wrought Mg–6wt% Al–1wt% Zn magnesium alloy

Pranjal Nautiyal, Jayant Jain, Arvind Agarwal

Materials Science and Engineering: A > 2016 > 650 > C > 183-189

This study reports the effect of loading path and precipitates on indentation induced creep behavior of AZ61 magnesium alloy. Indentation creep tests were performed on solution-treated and peak-aged extruded AZ61 magnesium alloy, and Atomic Force Microscopy (AFM) investigations were carried out to study deformation mechanisms. Twinning is the dominant creep mechanism for indentation along the extrusion...

article

Influence of Microstructure on Scratch-Induced Deformation Mechanisms in AZ80 Magnesium Alloy

Pranjal Nautiyal, Jayant Jain, Arvind Agarwal

Tribology Letters > 2016 > 61 > 3 > 1-7

Indentation scratch-induced wear in Mg-8 wt% Al-0.5 wt% Zn (AZ80) alloy is investigated in this study for solution-treated and peak-aged conditions. Aged alloy exhibited higher wear resistance, with 12–14 % reduction in wear volume. This is attributed to enhanced microstructural resistance to scratch wear due to precipitate phase. Ploughing was found to be the dominating material removal mechanism...

article

A comparative study of indentation induced creep in pure magnesium and AZ61 alloy

Pranjal Nautiyal, Jayant Jain, Arvind Agarwal

Materials Science & Engineering A > 2015 > 630 > Complete > 131-138

Nanoindentation creep tests were performed on pure Mg and Mg–6wt% Al–1wt% Zn (AZ61) alloy at room temperature. Plastic flow and creep were more pronounced in Mg than in AZ61. Pure Mg was found to exhibit two distinct steady state stress regimes, with the values of stress exponent equal to 4.5 and 12. Twinning is most likely to dominate initially, in the high stress regime. Crystallographic re-orientation,...

article

Effect of YAG addition on sintering of P/M 316L and 434L stainless steels

Jayant Jain, Ashish M. Kar, Anish Upadhyaya

Materials Letters > 2004 > 58 > 14 > 2037-2040

The present study examines the sintering behavior and effect of yttria alumina garnet (YAG) addition on ferritic (434L) and austenitic (316L) stainless steel during solid-state and supersolidus liquid-phase sintering (SLPS). Up to 10 wt.% YAG (Al ₅ Y ₃ O ₁ ₂ , AlYO ₃ ) was added to 316L and 434L stainless steel. The compacts were solid-state- and supersolidus-sintered...

Filter options

Publication date

Set your own date range

INFONA - science communication portal

Search results for: Jayant Jain

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Keywords

Data set

Journal

Reporting an error / abuse

Sending the report failed

Accessibility options