Experimental investigation on corrosion behaviour of Fe-C-Cr P/M alloy steels

2018 ◽  
Vol 69 (10) ◽  
pp. 1355-1367
Author(s):  
T. K. Kandavel ◽  
K. Praveen Sacs ◽  
M. Venkat Krishna
Keyword(s):  
Experimental Investigation ◽  
Corrosion Behaviour ◽  
Alloy Steels

scholarly journals Machinability Studies of Low Alloy Steels by Face Turning Method: An Experimental Investigation

2013 ◽  
Vol 64 ◽  
pp. 632-641 ◽  
Author(s):  
Rajshekhar Lalbondre ◽  
Prasad Krishna ◽  
G.C. Mohankumar
Keyword(s):  
Experimental Investigation ◽  
Low Alloy Steels ◽  
Alloy Steels

X-ray microanalysis of grain boundary segregation in steels by s.t.e.m

1980 ◽  
Vol 295 (1413) ◽  
pp. 137-137
Keyword(s):  
Grain Boundary ◽  
Corrosion Behaviour ◽  
Boundary Segregation ◽  
Specimen Preparation ◽  
Low Alloy Steels ◽  
X Ray ◽  
Thin Foils ◽  
Scanning Transmission ◽  
Residual Elements ◽  
Alloy Steels

Equilibrium segregation of Groups IV-VI residual elements during heat treatment ( ca . 773K) of commercial low alloy steels can significantly modify their toughness, impact properties, corrosion and stress corrosion behaviour and creep life. Since these segregations are highly localized (less than about 10 nm) and do not result in microstructural changes, their direct measurement has proved difficult. The most widely used method to date is Auger electron spectroscopy (A.e.s.). This technique is surface specific, requires uncontaminated intergranularly fractured surfaces and is therefore limited by specimen preparation. The development of scanning transmission electron microscopy (s.t.e.m.) with fine electron probes, ca . 15 nm in diameter, when coupled with an energy dispersive analyser enables high resolution X-ray microanalysis within thin foils. This allows grain boundary chemical analysis for elements with atomic number not less than 12. The application of this technique has been investigated by examining segregation of residual elements in experimental iron-based alloys and commercial ferritic steels.

TEM Analysis of Precipitates in a Low Alloy Wear Resistant Steel and Correlating with its Corrosion Behaviour

2018 ◽  
Vol 1148 ◽  
pp. 75-81 ◽  
Author(s):  
S. Naseema ◽  
B. Gaurav ◽  
G. Das ◽  
V.C. Srivatsava ◽  
K. Srinivas Rao ◽  
...  
Keyword(s):  
Corrosion Behaviour ◽  
Ferrite Matrix ◽  
Wear Behaviour ◽  
Low Alloy Steels ◽  
Resistant Steel ◽  
Mining Equipment ◽  
Corrosion Properties ◽  
Tem Analysis ◽  
Wear Resistant ◽  
Alloy Steels

Wear-resistant low alloy steels containing elements like Cr, Mo, attain their properties due to precipitation of carbides upon heat treatment. These steels are widely used for components in earthmoving and mining equipment. Even though the mechanical properties and wear behaviour of these steels are studied extensively, the studies on nature of carbide precipitation and their influence on corrosion behaviour are very rare. The present work attempts to correlate the microstructure with corrosion properties of low alloy wear resistant steel. After quenching from hot working temperature of about 900 °C, the alloy is subjected to tempering at two different temperatures i.e. 150 °C & 300 °C for durations of 1 h and 4 h. Two competitive process occur simultaneously effecting the hardness of the alloy during tempering i.e. (i) Softening due to transformation of martensite with depleting carbon (ii) Increase in hardness due to formation of carbide precipitates in the matrix. Transmission electron microscopy (TEM) of as quenched condition revealed fully martensite structure in the alloy. TEM investigation of 150 °C/ 4 h tempering condition, revealed presence of some amount of martensite and fine carbide precipitates in the alloy. TEM micrographs of 300 °C/ 4 h condition revealed relatively coarse carbides in a softer ferrite matrix. The presence of martensite and fine precipitates, resulted in relative improvements in wear and corrosion resistance respectively, for the alloy tempered at 150 °C for 4 h, when compared to the alloy tempered at 300 °C for 4 h.

Potentiokinetic and corrosimetric investigations of the corrosion behaviour of alloy steels

1963 ◽  
Vol 3 (4) ◽  
pp. 239-259 ◽  
Author(s):  
M. Pourbaix ◽  
L. Klimzack-Mathieiu ◽  
Ch. Mertens ◽  
J. Meunier ◽  
Cl. Vanleugenhaghe ◽  
...  
Keyword(s):  
Corrosion Behaviour ◽  
Alloy Steels
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