Effect of tempering temperature on resistance to deformation behavior for low carbon bainitic YP960 steels

Xie, Bao-sheng; Cai, Qingwu; Yu, Wan-Chin; Cao, Jia-ming; Yang, Yunfeng

doi:10.1016/j.msea.2014.09.054

Cited by 20 publications

(11 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, q, K 2 , and p are the calculated fitting coefficients. According to the literature [18,26,29,[41][42][43], these parameters can be directly correlated to the microstructural features of the material, such as the density of dislocations and their resulting mean free path. More specifically, q is inversely proportional to the dislocations free path λ, as indicated in Equation (5).…”

Section: 𝑞~1 𝑏𝜆mentioning

confidence: 99%

See 1 more Smart Citation

Assessment of the Hardening Behavior and Tensile Properties of a Cold-Rolled Bainitic–Ferritic Steel

2021

View full text Add to dashboard Cite

The automotive field is continuously researching safer, high-strength, ductile materials. Nowadays, dual-phase (DP) steels are gaining importance, since they meet all these requirements. Dual-phase steel made of ferrite and bainite is the object of a complete microstructural and mechanical characterization, which includes tensile and bending tests. This specific steel contains ferrite and bainite in equal parts; ferrite is the soft phase while bainite acts as a dispersed reinforcing system. This peculiar microstructure, together with fine dispersed carbides, an extremely low carbon content (0.09 wt%), and a minimal degree of strain hardening (less than 10%) allow this steel to compete with traditional medium-carbon single-phase steels. In this work, a full pearlitic C67 steel containing 0.67% carbon was used as a benchmark to build a comparative study between the DP and SP steels. Moreover, the Crussard–Jaoul (C-J) and Voce analysis were adopted to describe the hardening behavior of the two materials. Using the C-J analysis, it is possible to separately analyze the ferrite and bainite strain hardening and understand which alterations occur to DP steel after being cold rolled. On the other hand, the Voce equation was used to evaluate the dislocation density evolution as a function of the material state.

show abstract

Section: 𝑞~1 𝑏𝜆mentioning

confidence: 99%

“…where b is a constant equal to 2.1. K 2 is related to the decrease in dislocations due to their annihilation or absorption by the sub-boundary [29,43]. The higher the starting density of dislocations, the higher the annihilation effect during the tensile test; hence, the higher K 2 .…”

Section: 𝑞~1 𝑏𝜆mentioning

confidence: 99%

Assessment of the Hardening Behavior and Tensile Properties of a Cold-Rolled Bainitic–Ferritic Steel

2021

View full text Add to dashboard Cite

show abstract

“…Strain hardening stages were distinguished using a modified Crussard-Jaoul (C-J) analysis, which exhibits clearer distinction between stages than other analyses [13][14][15][16][17] . This analysis is based on the logarithmic form of Swift equation differentiated with respect to ε and is given by: Table 1.…”

Section: Mechanical Analysesmentioning

confidence: 99%

Influence of Temperature on Mechanical Properties, Fracture Morphology and Strain Hardening Behavior of a 304 Stainless Steel

2017

View full text Add to dashboard Cite

The strain hardening behavior of an AISI 304 stainless steel at different temperatures was investigated in this work. Specimens were tensile tested up to rupture at temperatures of 25, 50, 75, 100, 125 and 150 ºC by using a universal testing machine with an attached environmental test chamber. The induction of martensite by strain was assessed by X-ray diffraction and Rietveld refinement. The resultant fracture morphologies were analyzed by scanning electron microscopy. The changes in the mechanical properties as a function of temperature were evaluated through the variations in the stress-strain curve and the strain hardening behavior was described in terms of strain hardening rate, instantaneous strain hardening exponent and Crussard-Jaoul analysis. Six strain hardening stages were detected at lower temperatures, transitioning into three strain hardening stages at higher temperatures. Fracture surface was ductile at all studied temperatures, although differences in terms of dimple and void morphology were observed.

show abstract

“…The results of the study performed to analyze the strain hardening behavior are reported in Figure 7 and Table 4. The dual-logarithmic plot was used as proposed by other researchers [18,39]. Both curves in the plot show an initial not-linear increasing trend followed by a linear stage.…”

Section: Resultsmentioning

confidence: 99%

“…where A = q/k 2 , B = Mk 2 , and C = p. According to the literature [18], M is the Taylor's factor, q is related to the dislocation free path (λ), k 2 is the recovery rate, and p is a material constant. More specifically, q directly correlates with the grain size and dislocation density.…”

Section: Methodsmentioning

confidence: 99%

Directed Energy Deposition of AISI 316L Stainless Steel Powder: Effect of Process Parameters

Aversa

Marchese

Bassini

2021

Metals

View full text Add to dashboard Cite

During Laser Powder-Directed Energy Deposition (LP-DED), many complex phenomena occur. These phenomena, which are strictly related to the conditions used during the building process, can affect the quality of the parts in terms of microstructural features and mechanical behavior. This paper investigates the effect of building parameters on the microstructure and the tensile properties of AISI 316L stainless-steel samples produced via LP-DED. Firstly, the building parameters were selected starting from single scan tracks by studying their morphology and geometrical features. Next, 316L LP-DED bulk samples built with two sets of parameters were characterized in terms of porosity, geometrical accuracy, microstructure, and mechanical properties. The tensile tests data were analyzed using the Voce model and a correlation between the tensile properties and the dislocation free path was found. Overall, the data indicate that porosity should not be considered the unique indicator of the quality of an LP-DED part and that a mechanical characterization should also be performed.

show abstract

Effect of tempering temperature on resistance to deformation behavior for low carbon bainitic YP960 steels

Cited by 20 publications

References 18 publications

Assessment of the Hardening Behavior and Tensile Properties of a Cold-Rolled Bainitic–Ferritic Steel

Assessment of the Hardening Behavior and Tensile Properties of a Cold-Rolled Bainitic–Ferritic Steel

Influence of Temperature on Mechanical Properties, Fracture Morphology and Strain Hardening Behavior of a 304 Stainless Steel

Directed Energy Deposition of AISI 316L Stainless Steel Powder: Effect of Process Parameters

Contact Info

Product

Resources

About