scholarly journals A Comparative Study on the Dynamic Tensile Behavior of Nanostructured Bainitic and Quenched-Tempered Martensitic Steels

Metals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 728 ◽  
Author(s):  
Wen Zhou ◽  
Kaiming Wu ◽  
Lei Zhong ◽  
Cong Zhang ◽  
Tingpin Hou ◽  
...  
Keyword(s):  
Low Temperature ◽  
Tensile Properties ◽  
Retained Austenite ◽  
Total Elongation ◽  
Tensile Behavior ◽  
Martensitic Steels ◽  
Martensitic Microstructure ◽  
Bainitic Microstructure ◽  
Dynamic Tensile Test ◽  
Dynamic Tensile Properties

In order to assess the dynamic tensile behavior of a newly developed three-step low-temperature-transformed bainitic microstructure, and a conventional one-step isothermal bainitic microstructure, and a quenched and tempered martensitic microstructure, a comparative research was conducted by using the dynamic tensile test. The results showed that more film-like retained austenite was obtained in the three-step low-temperature-transformed sample. The carbon content in the film-like retained austenite was found to be higher as compared to the blocky retained austenite. The dynamic tensile properties were all improved with an increase in strain rates (from 0.1 to 500 s−1). However, the three-step bainitic low-temperature-transformed sample showed the most remarkable dynamic tensile properties, including ultimate tensile strength and total elongation. This is attributed to a better transformation-induced plasticity effect that is exhibited by the higher stability of the film-like retained austenite. Therefore, the present study suggests that performing a three-step low-temperature bainitic transformation promotes grain refinement and the formation of film-like retained austenite and improves the dynamic tensile properties.

scholarly journals Effect of Carbon Content in Retained Austenite on the Dynamic Tensile Behavior of Nanostructured Bainitic Steel

Metals ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 907 ◽  
Author(s):  
Wen Zhou ◽  
Tingping Hou ◽  
Cong Zhang ◽  
Lei Zhong ◽  
Kaiming Wu
Keyword(s):  
Strain Rate ◽  
Carbon Content ◽  
Tensile Properties ◽  
Retained Austenite ◽  
Carbon Film ◽  
Bainitic Steel ◽  
Low Carbon ◽  
Plasticity Effect ◽  
Bainite Steel ◽  
Dynamic Tensile Properties

Results of dynamic tensile testing of three-step low-temperature-transformed nanostructured bainitic steel and quenching and partitioning martensitic steel at different strain rates (0.1–500 s−1) are reported here. The results showed that the high carbon film-like austenite was much more stable than the low carbon blocky austenite during deformation. The nanostructured bainite steel exhibited the more remarkable dynamic tensile properties due to the better transformation-induced plasticity effect and strain rate hardening effect exhibited by stable film-like retained austenite. The big gap in engineering stress and strain curves occurred at a higher strain rate (100–200 s−1) for the nanostructured bainite steel because of the better stability of film-like austenite. Therefore, the present study is able to assist in explaining the effect of carbon content in retained austenite on the dynamic tensile properties and understanding the microstructure property relationship in complex steels.

scholarly journals Enhanced Low-Temperature Tensile Properties of Fe-14Cr-(4^|^sim;9)Ni Weld Metal by Retained Austenite

2012 ◽  
Vol 30 (2) ◽  
pp. 171-179 ◽  
Author(s):  
Hai QIU ◽  
Linning WANG ◽  
Hong ZUO ◽  
Goro ARAKANE ◽  
Fuxing YIN ◽  
...  
Keyword(s):  
Low Temperature ◽  
Weld Metal ◽  
Tensile Properties ◽  
Retained Austenite

Isothermal Transformation of Low Temperature Super Bainite

2010 ◽  
Vol 146-147 ◽  
pp. 1843-1848 ◽  
Author(s):  
Feng Hu ◽  
Kai Ming Wu
Keyword(s):  
Low Temperature ◽  
Carbon Content ◽  
Phase Boundary ◽  
Retained Austenite ◽  
Bainitic Ferrite ◽  
Isothermal Transformation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Bainitic Microstructure ◽  
Incomplete Reaction

Fine-scale bainitic microstructure with excellent mechanical properties has been achieved by transforming austenite to bainite at low temperature ranging from 200oC to 300oC. Microstructural observations and hardness measurements show that transformed microstructures consist of bainitic ferrite and carbon-enriched retained austenite. The thickness of bainitic ferrite plates is less than 50 nm. The hardness reaches approximately 640 HV1. Strong austenite and/or large driving force at the low transformation temperature leads to ultra fine bainitic ferrite plates. X-ray diffraction analysis indicates that low-temperature bainite transformation is an incomplete reaction. The carbon content in carbon-enriched retained austenite is below the para-equilibrium (Ae3′) phase boundary predicted. The carbon content in bainitic ferrite is less than that T0′ phase boundary predicted.

EVANOHM

Alloy Digest ◽  
1960 ◽  
Vol 9 (4) ◽  
Keyword(s):  
Electrical Resistivity ◽  
Low Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Temperature Coefficient ◽  
Base Alloy ◽  
Nickel Base Alloy ◽  
Temperature Coefficient Of Resistance ◽  
High Electrical Resistivity ◽  
Nickel Base

Abstract EVANOHM is a nickel-base alloy having low temperature coefficient of resistance and high electrical resistivity. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on joining. Filing Code: Ni-57. Producer or source: Wilbur B. Driver Company.

ISO-ELASTIC

Alloy Digest ◽  
1957 ◽  
Vol 6 (8) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Low Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Temperature Coefficient ◽  
Nickel Alloy ◽  
Modulus Of Elasticity ◽  
Heat Treating ◽  
Precision Instrument ◽  
Iron Nickel

Abstract ISO-ELASTIC is an iron-nickel alloy having low temperature coefficient of the modulus of elasticity. It is suitable for precision instrument springs. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, and machining. Filing Code: Fe-14. Producer or source: John Chatillon & Sons.

INVAR M93

Alloy Digest ◽  
2008 ◽  
Vol 57 (1) ◽  
Keyword(s):  
Fracture Toughness ◽  
Low Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Low Temperatures ◽  
Bend Strength ◽  
Temperature Performance ◽  
Ni Content ◽  
Precision Alloys ◽  
Ni Alloy

Abstract Invar is an Fe-Ni alloy with 36% Ni content that exhibits the lowest expansion of known metals from very low temperatures up to approximately 230 deg C (445 deg F). Invar M93 is a cryogenic Invar with improved weldability. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear and bend strength as well as fracture toughness and fatigue. It also includes information on low temperature performance as well as forming and joining. Filing Code: FE-143. Producer or source: Metalimphy Precision Alloys.

COPPER ALLOY No. 510

Alloy Digest ◽  
1971 ◽  
Vol 20 (8) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Low Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Copper Alloy ◽  
High Strength ◽  
Heat Treating ◽  
Fatigue Properties ◽  
Temperature Performance ◽  
Tin Bronze

Abstract COPPER ALLOY No. 510 is a tin bronze containing about 0.25% phosphorus. It combines high strength and toughness with excellent fatigue properties. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep and fatigue. It also includes information on low temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-238. Producer or source: Brass mills.

BELMONT ALLOY 2505

Alloy Digest ◽  
1978 ◽  
Vol 27 (11) ◽  
Keyword(s):  
Low Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Tube Bending

Abstract BELMONT ALLOY 2505 is a bismuth-base, eutectic, low-melting alloy. It melts at 158 F and provides engineers and technicians with an easily castable material that is ready for use as soon as it freezes. Alloy 2505 can be recovered easily and recycled into new uses any number of times. Its many uses include shuttle blocks, tube bending, chucks for lens buffing and grinding, anchoring, dies, and low-temperature solder. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on forming, heat treating, and machining. Filing Code: Bi-9. Producer or source: Belmont Metals Inc..

CERROLOW-117 Alloy

Alloy Digest ◽  
1978 ◽  
Vol 27 (10) ◽  
Keyword(s):  
Low Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Melting Temperature ◽  
Eutectic Alloy ◽  
Heat Treating ◽  
Dental Models ◽  
Metal Products

Abstract CERROLOW-117 Alloy is a bismuth-base eutectic alloy that melts at 117 F (47 C). Its low melting temperature and controlled-shrinkage characteristics make it very useful in industry for such applications as proof casting in tool and die shops, dental models and low-temperature solder. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on casting, forming, heat treating, and machining. Filing Code: Bi-8. Producer or source: Cerro Metal Products.

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