Search results for: T.K. Nandy

Items from 1 to 20 out of 45 results

article

Effect of composition, heat treatment and deformation on mechanical properties of tungsten heavy alloys

Ashutosh Panchal, T.K. Nandy

Materials Science and Engineering: A > 2018 > 733 > C > 374-384

Five different compositions of tungsten heavy alloy with Ni, Fe, Co and Mo were prepared through powder metallurgy route using liquid phase sintering. Three alloys were based on quaternary W-Ni-Fe-Co (with varying Ni to Fe ratio and Co content) and the other two quinary systems with Mo addition. The sintered alloy blanks (cylindrical cross section) were subjected to a thermo-mechanical treatment,...

article

On structure property correlation in high strength tungsten heavy alloys

Anjali Kumari, M. Sankaranarayana, T.K. Nandy

International Journal of Refractory Metals and Hard Materials > 2017 > 67 > C > 18-31

Detailed structure-property correlation has been carried out in high strength tungsten heavy alloys. Alloys of compositions 90W-6Ni-2Fe-2Co, 89W-6Ni-2Fe-3Co, 89.5W-6Ni-2Fe-2Co-0.5Mo, 89.75W-6Ni-2Fe-2Co-0.25Mo, 90W-6Ni-1.5Fe-2.5Co and 90W-6Ni-1Fe-3Co have been prepared by liquid phase sintering followed by large deformation during thermo mechanical processing and studied for microstructure and mechanical...

article

Refractory metal alloying: A new method for improving mechanical properties of tungsten heavy alloys

U. Ravi Kiran, A. Panchal, M. Prem Kumar, M. Sankaranarayana, more

Journal of Alloys and Compounds > 2017 > 709 > C > 609-619

Influence of mechanically alloyed tungsten-rhenium powders on the microstructure and mechanical properties of liquid phase sintered 89W-7Ni-3Fe-1Re heavy alloy was studied. Heat treatment and swaging were conducted on alloys prepared using both conventionally blended and mechanically milled powders. The results indicated the formation of bcc solid solution by high energy milling of tungsten and rhenium...

article

Effect of solution treatment temperature and cooling rate on the mechanical properties of tungsten heavy alloy

Anjali Kumari, G. Prabhu, M. Sankaranarayana, T.K. Nandy

Materials Science and Engineering: A > 2017 > 688 > C > 225-236

The present study investigates the effect of solution treatment temperature and cooling rate on mechanical properties of a tungsten heavy alloy (89.6W-6.2Ni-1.8Fe-2.4Co). In addition to water quenching, rapid argon quenching has been attempted in this study since it is a relatively cleaner process and it can be used in conjunction with vacuum treatment. Since in these alloys, there is a possibility...

article

Effect of cyclic heat treatment and swaging on mechanical properties of the tungsten heavy alloys

U. Ravi Kiran, Jalaj Kumar, Vikas Kumar, M. Sankaranarayana, more

Materials Science and Engineering: A > 2016 > 656 > C > 256-265

A tungsten heavy alloy containing cobalt and molybdenum was subjected to thermo-mechanical processing that employed cyclic heat treatments in order to explore the possibility of enhancing mechanical properties. The alloy was synthesized by liquid phase sintering followed by heat treatments which consisted single as well as multiple cycles. Subsequently, these were subjected to warm swaging imparting...

article

Tensile and fracture behavior of boron and carbon modified Ti-15-3 alloys in aged conditions

R. Sarkar, P. Ghosal, T.K. Nandy, K.K. Ray

Materials Science and Engineering: A > 2016 > 656 > C > 223-233

This work illustrates the effect of boron and carbon addition on the mechanical behavior of a beta Ti alloy, Ti–15V–3Cr–3Al–3Sn (Ti-15-3), in differently aged conditions. The alloys were prepared by consumable vacuum arc melting followed by forging and hot rolling. These were subsequently solution treated and aged at different temperatures above 500°C for 8h. Standard tensile and plane strain fracture...

article

Serrated flow behavior in tungsten heavy alloy

Jiten Das, M. Sankaranarayana, T.K. Nandy

Materials Science and Engineering: A > 2015 > 646 > C > 75-81

Flow behavior of a tungsten heavy alloy of composition, 90.5wt% W–7.1wt% Ni–1.65wt% Fe–0.5wt% Co–0.25wt% Mo was investigated in a temperature range of 223–973K and strain rate range of 10⁻⁵–10⁻²s⁻¹. In the temperature range of 773–873K, the stress strain curves were characterized by jerky flow pointing towards Dynamic Strain Ageing (DSA)/Portevin Le-Chatelier's (PLC) effect. Characteristics of DSA...

article

Effect of alloying addition and microstructural parameters on mechanical properties of 93% tungsten heavy alloys

U. Ravi Kiran, A. Panchal, M. Sankaranarayana, G.V.S. Nageswara Rao, more

Materials Science and Engineering: A > 2015 > 640 > C > 82-90

Liquid phase sintering, heat treatment and swaging studies on three tungsten heavy alloys, 93W–4.9Ni–2.1Fe (wt%), 93W–4.2Ni–1.2Fe–1.6Co (wt%) and 93W–4.9Ni–1.9Fe–0.2Re (wt%) were carried out in detail with respect to microstructure, tensile and impact properties. All the alloys were sintered and swaged to 40% deformation. The results indicate that Re addition reduces the grain size of the alloy compared...

article

Effect of boron and carbon addition on microstructure and mechanical properties of metastable beta titanium alloys

Ravinaik Banoth, Rajdeep Sarkar, Amit Bhattacharjee, T.K. Nandy, more

Materials and Design > 2015 > 67 > Complete > 50-63

Effect of boron and carbon on microstructure and mechanical properties of β titanium alloys Ti–15V–3Cr–3Mo–3Sn, Ti–10V–2Fe–3Al, and Ti–5V–5Mo–5Al–3Cr has been studied in detail. The addition of boron and carbon results in refinement of β grain size and α-precipitates during ageing. While the hardness and tensile strength increase with the addition of boron and carbon, the elongation to failure deteriorates...

article

Crystallographic orientation relationships of boride and carbide particles with α and β phases in a β-Ti alloy

Rajdeep Sarkar, Phani S. Karamched, P. Ghosal, K.S. Prasad, more

Journal of Alloys and Compounds > 2014 > 612 > Complete > 435-442

The aim of this investigation is to study the crystallographic orientation relationships of TiB and TiC with α- and β-phases in a boron and another carbon containing beta titanium alloys (Ti-15V-3Al-3Sn-3Cr), using orientation microscopy and transmission electron microscopy. The alloys were heat-treated further to study the effect of these boride and carbide particles on the nucleation of α-phases...

article

Oxidation studies on W–Nb alloy

Jiten Das, G. Appa Rao, S.K. Pabi, M. Sankaranarayana, more

International Journal of Refractory Metals and Hard Materials > 2014 > 47 > Complete > 25-37

An exploratory study has been initiated on W–Nb alloy for elevated temperature application. The alloy was prepared by mechanical alloying followed by sintering at 2063K. This is followed by a detailed characterization of microstructure and oxidation resistance properties. Generally, a two phase microstructure comprising W–rich and Nb-rich solid solutions was observed especially in alloys containing...

article

Thermo-mechanical processing, microstructure and tensile properties of a tungsten heavy alloy

Jiten Das, G. Appa Rao, S.K. Pabi, M. Sankaranarayana, more

Materials Science and Engineering: A > 2014 > 613 > C > 48-59

The effect of heat treatment and swaging on microstructure and mechanical properties of a tungsten heavy alloy (WHA) of composition 90.5W–7.1Ni–1.65Fe–0.5Co–0.25Mo (wt%) has been examined in this study. The volume fraction and the contiguity of W-grains in the sintered microstructure decrease from 80% to 75% and 0.7 to 0.3, respectively, following an intermediate heat treatment comprising annealing...

article

Tensile and impact properties of microwave sintered tungsten heavy alloys

G. Prabhu, N. Arvind Kumar, M. Sankaranarayana, T.K. Nandy

Materials Science & Engineering A > 2014 > 607 > Complete > 63-70

The present study investigates the interrelationship between microstructure, tensile and impact properties of microwave sintered tungsten heavy alloys. Alloys of two different compositions were microwave sintered and conventionally liquid phase sintered using similar heating rate, followed by microstructure and mechanical property evaluation. The tensile properties of microwave sintered alloys were...

article

Monotonic and low cycle fatigue behavior of an O+B2 alloy at high temperatures

G. Srinivasulu, P. Ghosal, N. Singh, L. Nazé, more

Materials Science & Engineering A > 2014 > 599 > Complete > 268-278

Low cycle fatigue behavior of an O+B2 alloy was evaluated at 650°C in ambient atmosphere under fully reversed total axial strain controlled mode. Three different microstructures, namely equiaxed O plus aged B2 (fine O plates in B2 matrix), lenticular O laths plus aged B2 and a pancake composite microstructure comprising equiaxed α2, lenticular O and aged B2, were selected to study the effect of microstructure...

article

Influence of thermomechanical processing and heat treatment on microstructure, tensile properties and fracture toughness of Ti-1100-0.1B alloy

V.K. Chandravanshi, A. Bhattacharjee, S.V. Kamat, T.K. Nandy

Journal of Alloys and Compounds > 2014 > 589 > Complete > 336-345

The effects of thermomechanical processing and heat treatment on the microstructure, tensile properties and fracture toughness of 0.1wt.% boron modified Ti-1100 alloy (Ti-1100-0.1B) processed by vacuum arc melting was investigated at room temperature and compared with that of the base alloy. The tensile properties of the base alloy (Ti-1100) were significantly lower in the β-processed as compared...

article

Effect of tungsten content on microstructure and mechanical properties of swaged tungsten heavy alloys

U. Ravi Kiran, S. Venkat, B. Rishikesh, V.K. Iyer, more

Materials Science & Engineering A > 2013 > 582 > Complete > 389-396

This paper describes the effect of tungsten content on microstructure and mechanical properties of swaged Co-containing tungsten heavy alloys with varying tungsten (90W–7Ni–2Fe–1Co, 93W–4.9Ni–1.4Fe–0.7Co and 95W–3.5Ni–1Fe–0.5Co). With increasing tungsten while tensile strength goes through a maximum, both percent elongation and impact energy decrease. Microstructure and fractographic analyses have...

article

Tensile and fracture toughness of high strength β Titanium alloy, Ti–10V–2Fe–3Al, as a function of rolling and solution treatment temperatures

G. Srinivasu, Y. Natraj, A. Bhattacharjee, T.K. Nandy, more

Materials and Design > 2013 > 47 > Complete > 323-330

The effect of processing and heat treatment has been studied on tensile properties and fracture toughness of a high strength metastable beta titanium alloy, Ti–10V–2Fe–3Al. The alloy was double melted by vacuum arc melting and subsequently subjected to thermomechanical processing that included combinations of rolling and solution heat treatment both in α−β and β phase fields. Rolling temperatures...

article

Finite element modelling of α particle size on the stress strain curve of near beta Ti alloy

G. Srinivasu, R.N. Rao, T.K. Nandy, D.K. Gupta

Materials and Design > 2013 > 46 > Complete > 8-15

In the present study the stress–strain curve of low cost near β titanium alloy (Ti–10V–4.5Fe–3Al) at 16%volume fraction of α was measured. Also, it was simulated to be based on the stress–strain curves of individual phases both α and β by using Finite Element Method (FEM), then measured result compared with the calculated curve. The average error between the predicted and measured one is 6.22% and...

article

Tensile and impact behavior of swaged tungsten heavy alloys processed by liquid phase sintering

U. Ravi Kiran, A. Panchal, M. Sankaranarayana, T.K. Nandy

International Journal of Refractory Metals and Hard Materials > 2013 > 37 > Complete > 1-11

The microstructural influence on fracture behavior of tensile and Charpy impact toughness properties were investigated for 90W6Ni2Fe2Co and 90W6Ni2Fe1.5Mo0.5Co tungsten heavy alloys, which are in use of kinetic energy penetrators. The alloys were sintered, heat treated and swaged with 40% reduction in area. Both microstructure and mechanical properties were sensitively dependent on the alloy composition...

article

Transient creep in titanium alloys: Effect of stress, temperature and trace element concentration

S. Gollapudi, D.V.V. Satyanarayana, C. Phaniraj, T.K. Nandy

Materials Science & Engineering A > 2012 > 556 > Complete > 510-518

The influence of stress, temperature and trace element concentration viz. Fe, Ni on the transient creep behavior of Ti-834 alloy, i.e. Ti–5.8Al–4.0Sn–3.5Zr–0.7Nb–0.5Mo–0.35Si–0.06C (in wt%) was studied. Two Ti-834 alloys, DMR Ti834 and TIMETAL 834 with higher and lower contents of (Fe, Ni) respectively were chosen for this study. Both alloys were given controlled heat treatments to develop microstructures...

Publication date

Set your own date range

INFONA - science communication portal

Search results for: T.K. Nandy

Effect of composition, heat treatment and deformation on mechanical properties of tungsten heavy alloys

On structure property correlation in high strength tungsten heavy alloys

Refractory metal alloying: A new method for improving mechanical properties of tungsten heavy alloys

Effect of solution treatment temperature and cooling rate on the mechanical properties of tungsten heavy alloy

Effect of cyclic heat treatment and swaging on mechanical properties of the tungsten heavy alloys

Tensile and fracture behavior of boron and carbon modified Ti-15-3 alloys in aged conditions

Serrated flow behavior in tungsten heavy alloy

Effect of alloying addition and microstructural parameters on mechanical properties of 93% tungsten heavy alloys

Effect of boron and carbon addition on microstructure and mechanical properties of metastable beta titanium alloys

Crystallographic orientation relationships of boride and carbide particles with α and β phases in a β-Ti alloy

Oxidation studies on W–Nb alloy

Thermo-mechanical processing, microstructure and tensile properties of a tungsten heavy alloy

Tensile and impact properties of microwave sintered tungsten heavy alloys

Monotonic and low cycle fatigue behavior of an O+B2 alloy at high temperatures

Influence of thermomechanical processing and heat treatment on microstructure, tensile properties and fracture toughness of Ti-1100-0.1B alloy

Effect of tungsten content on microstructure and mechanical properties of swaged tungsten heavy alloys

Tensile and fracture toughness of high strength β Titanium alloy, Ti–10V–2Fe–3Al, as a function of rolling and solution treatment temperatures

Finite element modelling of α particle size on the stress strain curve of near beta Ti alloy

Tensile and impact behavior of swaged tungsten heavy alloys processed by liquid phase sintering

Transient creep in titanium alloys: Effect of stress, temperature and trace element concentration

Filter options

Publication date

Keywords

Data set

Journal

INFONA - science communication portal

Search results for: T.K. Nandy

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