Effect of heat treatment on the crystalline structure of martensite in iron-, nickel-, manganese- and silicon-doped CoW and CoMo alloys

1993 ◽  
Vol 41 (2) ◽  
pp. 513-515 ◽  
Author(s):  
B.I. Nikolin ◽  
A.Yu. Babkevich ◽  
T.V. Izdkovskaya ◽  
S.N. Petrova
Keyword(s):  
Heat Treatment ◽  
Crystalline Structure ◽  
Iron Nickel ◽  
Silicon Doped ◽  
Nickel Manganese

Magnesium Alloys

1937 ◽  
Vol 41 (317) ◽  
pp. 369-387 ◽  
Author(s):  
C. H. Desch
Keyword(s):  
Heat Treatment ◽  
Magnesium Alloys ◽  
Crystalline Structure

SummaryAn account is given of developments during the last three years in the production of light magnesium alloys suitable for aircraft construction. The heat-treatment of castings and the hardening by ageing of forged alloys are considered as well as the copditions affecting forging at various temperatures. The connection between these properties and the crystalline structure of magnesium is discussed.

Comparison of Microstructure and Mechanical Properties of Additively Manufactured and Conventional Maraging Steel

2020 ◽  
Vol 405 ◽  
pp. 133-138
Author(s):  
Ludmila Kučerová ◽  
Andrea Jandová ◽  
Ivana Zetková
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Maraging Steel ◽  
Precipitation Hardening ◽  
High Strength ◽  
Hardness Measurement ◽  
Nickel Steel ◽  
Heat Treated ◽  
Good Material ◽  
Iron Nickel

Maraging steel is an iron-nickel steel alloy, which achieves very good material properties like high toughness, hardness, good weldability, high strength and dimensional stability during heat treatment. In this work, maraging steel 18Ni-300 was manufactured by selective laser melting. It is a method of additive manufacturing (AM) technology, which produces prototypes and functional parts. Sample of additively manufactured and conventional steel with the same chemical composition were tested after in three different states – heat treated (as-built/as-received), solution annealed and precipitation hardened. Resulting microstructures were analysed by light and scanning electron microscopy and mechanical properties were obtained by hardness measurement and tensile test. Cellular martensitic microstructures were observed in additively manufactured samples and conventional maraging steel consisted of lath martensitic microstructures. Very similar mechanical properties were obtained for both steels after the application of the same heat treatment. Ultimate tensile strengths reached 839 – 900 MPa for samples without heat treatment and heat treated by solution annealing, the samples after precipitation hardening had tensile strengths of 1577 – 1711 MPa.

The influence of heat treatment on the semi-crystalline structure of polyaniline Emeraldine-salt form

2017 ◽  
Vol 1128 ◽  
pp. 707-717 ◽  
Author(s):  
Lilian R. de Oliveira ◽  
Lizandro Manzato ◽  
Yvonne P. Mascarenhas ◽  
Edgar A. Sanches
Keyword(s):  
Heat Treatment ◽  
Crystalline Structure ◽  
Emeraldine Salt ◽  
Salt Form
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