Effects of annealing conditions on microstructure and mechanical properties of low carbon, manganese transformation-induced plasticity steel

Jang, Jae-Myeong; Kim, Sung-Joon; Kang, Nam Jun; Cho, Kyung-Mox; Suh, Dong‐Woo

doi:10.1007/s12540-009-0909-7

Cited by 78 publications

(45 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This ferrite is generally elongated by rolling and raises the density of dislocations inside grains and along grain boundaries, which can act as nucleation sites for bainitic microstructures during cooling. [21] In the T-series specimens, thus, the ferrite exists together with bainitic microstructures, but its identification is not easy, because it is very fine and mixed with adjacent bainitic microstructures. Since its quantification is difficult, its volume fraction is included in the volume fracture of AF or GB.…”

Section: A Microstructurementioning

confidence: 99%

Effects of Rolling and Cooling Conditions on Microstructure and Tensile and Charpy Impact Properties of Ultra-Low-Carbon High-Strength Bainitic Steels

Sung

Shin

Hwang

et al. 2010

Metall Mater Trans A

View full text Add to dashboard Cite

Six ultra-low-carbon high-strength bainitic steel plates were fabricated by controlling rolling and cooling conditions, and effects of bainitic microstructure on tensile and Charpy impact properties were investigated. The microstructural evolution was more critically affected by start cooling temperature and cooling rate than by finish rolling temperature. Bainitic microstructures such as granular bainites (GBs) and bainitic ferrites (BFs) were well developed as the start cooling temperature decreased or the cooling rate increased. When the steels cooled from 973 K or 873 K (700°C or 600°C) were compared under the same cooling rate of 10 K/s (10°C/s), the steels cooled from 973 K (700°C) consisted mainly of coarse GBs, while the steels cooled from 873 K (600°C) contained a considerable amount of BFs having high strength, thereby resulting in the higher strength but the lower ductility and upper shelf energy (USE). When the steels cooled from 673 K (400°C) at a cooling rate of 10 K/s (10°C/s) or 0.1 K/s (0.1°C/s) were compared under the same start cooling temperature of 873 K (600°C), the fast cooled specimens were composed mainly of coarse GBs or BFs, while the slowly cooled specimens were composed mainly of acicular ferrites (AFs). Since AFs had small effective grain size and contained secondary phases finely distributed at grain boundaries, the slowly cooled specimens had a good combination of strength, ductility, and USE, together with very low energy transition temperature (ETT).

show abstract

Section: A Microstructurementioning

confidence: 99%

Effects of Rolling and Cooling Conditions on Microstructure and Tensile and Charpy Impact Properties of Ultra-Low-Carbon High-Strength Bainitic Steels

Sung

Shin

Hwang

et al. 2010

Metall Mater Trans A

View full text Add to dashboard Cite

show abstract

“…According to Suh et al [13,14], the hot-rolled Fee5Mne0.12Ce0.5Si (wt.%) steel with over 3 wt% Al exhibited a dual-phase microstructure of a ferrite and a 0 martensite. After cold rolling and intercritical annealing, the a grains were recrystallized to be relatively coarse grains (approximately 3 mm); the a 0 martensite reverted to ultrafine-grained (approximately 300 nm) a and g phases.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of bimodal-grained Al-free medium Mn steel by double intercritical annealing and its tensile properties

Han

Kang

Lee

et al. 2016

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…In these steels the Al addition, typically less than 3%, results in a slight reduction in density which is beneficial to weight reduction of car body. Al also stabilizes the austenitic phase and plays an important role promoting twinning inside grains [2][3][4][5] Al-added TWIP steels are an evolution of the Fe-18Mn-0.6C steel, that is a baseline TWIP steel shown to have the desirable twinning mechanism. However Fe-18Mn-0.6C steel had several problems as a low yield strength in the annealed condition (around 250 MPa), the occurrence of cementite precipitation during cooling after hot rolling and/or annealing and the susceptibility to hydrogen delayed fracture [6].…”

Section: Introductionmentioning

confidence: 99%

Notch ductility of steels for automotive components

Faccoli¹,

Cornacchia²,

Gelfi³

et al. 2014

Engineering Fracture Mechanics

View full text Add to dashboard Cite

Effects of annealing conditions on microstructure and mechanical properties of low carbon, manganese transformation-induced plasticity steel

Cited by 78 publications

References 14 publications

Effects of Rolling and Cooling Conditions on Microstructure and Tensile and Charpy Impact Properties of Ultra-Low-Carbon High-Strength Bainitic Steels

Effects of Rolling and Cooling Conditions on Microstructure and Tensile and Charpy Impact Properties of Ultra-Low-Carbon High-Strength Bainitic Steels

Fabrication of bimodal-grained Al-free medium Mn steel by double intercritical annealing and its tensile properties

Notch ductility of steels for automotive components

Contact Info

Product

Resources

About