Curing damage in metallic materials by means of regenerative heat treatment

1995 ◽  
Vol 37 (4) ◽  
pp. 136-140 ◽  
Author(s):  
V. I. Kumanin ◽  
L. A. Kovaleva ◽  
M. L. Sokolova
Keyword(s):  
Heat Treatment ◽  
Metallic Materials ◽  
Regenerative Heat

scholarly journals Deep Cryogenic Treatment of Metallic Materials

2020 ◽  
Author(s):  
Patricia Jovičević-Klug ◽  
Bojan Podgornik
Keyword(s):  
Crystal Structure ◽  
Heat Treatment ◽  
Corrosion Resistance ◽  
Cryogenic Treatment ◽  
Metallic Materials ◽  
Size Change ◽  
Ferrous Alloys ◽  
Deep Cryogenic Treatment ◽  
Ferrous Metals ◽  
Proper Material

Deep cryogenic treatment (DCT) is a type of cryogenic treatment, where a metallic material is subjected to temperatures below -150°C, normally to temperatures of liquid nitrogen (-196 °C). When a material is exposed to DCT as a part of heat treatment, changes in microstructure are induced due to new grain formation, changes in grain size, change in the solubility of atoms, movement of dislocations, alteration of crystal structure, and finally new phase formation. The metallic material's performance and later performance of manufactured components and tools from this specific material are dependent on the selection of proper design, proper material, accuracy with which the tool is made and application of proper heat treatment, including any eventual DCT. Metallic materials are ferrous and non-ferrous metals. In the last years ferrous metals (different grades of steel) and non-ferrous alloys (aluminum, magnesium, titanium, nickel etc.) have been increasingly treated with DCT to alter their properties. DCT treatment has shown to reduce density of defects in crystal structure, increase wear resistance of material, increase hardness, improve toughness, and reduce tensile strength and corrosion resistance. However, some researchers also reported results showing no change in properties (toughness, hardness, corrosion resistance, etc.) or even deterioration when subjected to DCT treatment. This leads to a lack of consistency and reliability of the treatment process, which is needed for successful application in industry. This review provides a synopsis of DCT usage and resulting effects on treated materials used in automotive industry.

Development of an Optimal Heat Treatment Regime for a Gradient Material Containing Tungsten Carbide

2017 ◽  
Vol 909 ◽  
pp. 219-224
Author(s):  
Ilia V. Chumanov ◽  
A.N. Anikeev
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Treatment Effect ◽  
Metal Structure ◽  
Gradient Material ◽  
Metallic Materials ◽  
Treatment Development ◽  
Optimal Heat Treatment ◽  
Heat Treatment Regime ◽  
Metal Products

One of the main processes in metal products is heat treatment. However, existing regimes of heat treatment are not suitable for the new gradient metals. This article presents a method of obtaining gradient metallic materials and heat treatment development. Also presents the studies results of heat treatment effect on mechanical properties and metal structure.

scholarly journals Life Extension of Creep Damaged Low Alloy Steel Welds by Regenerative Heat Treatment

2010 ◽  
Vol 50 (8) ◽  
pp. 1217-1223
Author(s):  
Masashi Ozaki ◽  
Fumitoshi Sakata ◽  
Masaru Kodama ◽  
Nobuhiko Nishimura
Keyword(s):  
Heat Treatment ◽  
Alloy Steel ◽  
Life Extension ◽  
Low Alloy Steel ◽  
Regenerative Heat ◽  
Steel Welds

The Role of Post Service Heat Treatment on the Contributions of Creep Deformation and Fracture to Service Life of AISI Type 316H Steel Components

2018 ◽  
Vol 774 ◽  
pp. 247-252
Author(s):  
A.D. Warren ◽  
B. Chen ◽  
I. Griffiths ◽  
P.E.J. Flewitt
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Limiting Factor ◽  
Time To Failure ◽  
Aging Effects ◽  
Regenerative Heat ◽  
Aisi Type ◽  
Deformation And Fracture ◽  
Creep Cavitation

Creep cavitation is a life limiting factor in stainless steel high temperature plant. However, regenerative heat treatments offer the potential of sintering creep cavities and thus extending a component’s time to failure. This is countered by thermal aging effects which can lead to precipitate formation and an increased creep rate. This study investigates these behaviours in a AISI Type 316H austenitic stainless steel.

Healing of Fatigue Crack in Metallic Materials by Heat Treatment and Evaluation of Fatigue Crack Propagation

2016 ◽  
Vol 2016 (0) ◽  
pp. J0460101
Author(s):  
Yuto FURUYA ◽  
Takashi OKAMURA ◽  
Shoma TAKEDA ◽  
Atsushi HOSOI ◽  
Sehiro KIMURA ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Fatigue Crack ◽  
Crack Propagation ◽  
Fatigue Crack Propagation ◽  
Metallic Materials

Mechanical Properties of G17CrMoV5 – 10 Cast Steel after Regenerative Heat Treatment

2009 ◽  
Vol 147-149 ◽  
pp. 732-737 ◽  
Author(s):  
Grzegorz Golański
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Impact Energy ◽  
Cast Steel ◽  
Negative Influence ◽  
Optimum Combination ◽  
Structure And Properties ◽  
Tempering Temperature ◽  
Regenerative Heat ◽  
Bainitic Structure

The paper presents results of research on the influence of regenerative heat treatment on structure and properties of G17CrMoV5 – 10 cast steel. Investigated material was taken out from a turbine frame serviced for over 250 000 hours (total service time) at the temperature of 535 oC. The cast steel after service revealed degraded bainitic-ferritic structure and was characterized by mechanical properties ranging below norm requirements. It has been proved that high tempering temperature in the case of cast steel with bainitic structure ensures optimum combination of mechanical properties and impact energy. It has also been shown that ferrite has a negative influence on impact energy of the cast steel with bainitic-ferritic structure.

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