Grain character and mechanical properties of Fe-21Cr-15Ni-6Mn-Nb non-magnetic stainless steel after solution treatment

Song, Yanlei; Li, Changsheng; Li, Bin-Zhou; Han, Yahui

doi:10.1016/j.msea.2018.02.056

Cited by 18 publications

(5 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…If the residual Nb(C, N) particles are excessive after solution treatment, the content of Nb in the experimental steel will decrease, and the effect of precipitation strengthening in aging treatment will be greatly reduced. In the present study, since the diameter of Nb(C, N) precipitates at the grain boundary was less than 100 nm and the distance between them is more than 10 µm, the residual Nb(C, N) particles in solution treatment had no effect on the microstructure and properties of experimental steel with aging treatment [25]. Through TEM observation and diffraction spot calibration, the granular precipitate can be determined as Nb(C, N), which is a typical face-centered cubic structure with a lattice constant of 0.447 nm [24], as shown in Figure 3.…”

Section: Microstructure After Aging Treatmentmentioning

confidence: 56%

“…When the temperature is high enough or the time is long enough, the coarsening of precipitates is unavoidable [22,24], which weaken the strengthening effect. According to the LSW theory proposed by Lifshitz, Slyozov and Wagner [23,25], the relationship between the size of roughened particles and time is shown in Equation (1).…”

Section: Coarsening Of the (Nb V)(c N) Precipitatesmentioning

confidence: 99%

See 1 more Smart Citation

The Effect of Aging on Precipitates, Mechanical and Magnetic Properties of Fe-21Cr-15Ni-6Mn-Nb Low Magnetic Stainless Steel

Dong

et al. 2021

Metals

View full text Add to dashboard Cite

The effect of aging on the precipitates, mechanical and magnetic properties of Fe-21Cr-15Ni-6Mn-Nb low magnetic stainless steel were investigated. The steel was aged at 550–750 °C for 2 h after solution heat treatment at 1100 °C for 1 h. During the aging treatment, the (Nb, V)(C, N) particles gradually precipitated in the grain, which were coherent or semi-coherent with the matrix. When the aging temperature was beyond 650 °C, the coarsening rate of (Nb, V)(C, N) particles increase rapidly and the coherent orientation between (Nb, V)(C, N) particles and the matrix was lost gradually. Meanwhile, coarse M23C6 was distributed at the grain boundary with chain shape, which was non-coherent with the matrix. The coarsening behavior of (Nb, V)(C, N) precipitates in the grain was analyzed, and the size of the particles precipitated after aging treatment at 650°C for different time was calculated and studied. After aging treatment at 650 °C for 2 h, the yield strength and tensile strength of the stainless steel was 705.6 MPa and 1002.3 MPa, the elongation and the relative magnetic permeability was 37.8% and 1.0035, respectively.

show abstract

Section: Microstructure After Aging Treatmentmentioning

confidence: 56%

Section: Coarsening Of the (Nb V)(c N) Precipitatesmentioning

confidence: 99%

The Effect of Aging on Precipitates, Mechanical and Magnetic Properties of Fe-21Cr-15Ni-6Mn-Nb Low Magnetic Stainless Steel

Dong

et al. 2021

Metals

View full text Add to dashboard Cite

show abstract

“…Zhou et al [13] found that HNS in a mixed-acid solution of 0.8 mol/L H 2 SO 4 and 0.8 mol/L HCl exhibited enhanced corrosion resistance after appropriate heat treatment. Secondphase stainless steel contains M 23 C 6 carbides (where M represents Fe, Cr or Mo), as well as intermetallic compounds [14,15] which enable the structural components of stainless steel to become uniformly distributed, so that any harmful phase can be fully dissolved into the solid solution and re-precipitation is inhibited [16]. Hao et al [17] reported that the banded microstructure formed in austenitic stainless steel after cold and hot rolling was eliminated by solution treatment at 1100 • C for 30 min.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Behaviors of Fe-22Cr-16Mn-0.55N High-Nitrogen Austenitic Stainless Steel in 3.5% NaCl Solution

Gao

Han

et al. 2022

Coatings

View full text Add to dashboard Cite

In this study, the corrosion behavior of the high-nitrogen austenitic stainless steel (HNS) Fe-22Cr-16Mn-0.55N before and after solution treatment (ST) in 3.5% NaCl solution has been investigated. The effect of a solution temperature of 1100 °C and heat preservation for 30 min on the corrosion resistance and passive film protection of HNS steel was studied. Open-circuit potential, potentiodynamic polarization and electrochemical impedance tests were used to assess the corrosion resistance of treated and untreated steels. In addition, potentiostatic polarization and XPS techniques together with Mott–Schottky curves were applied to determine the composition and properties of the passive films. The results showed that after solution treatment, the grain size of HNS decreased and the grain became more uniform. Although corrosion occurred on HNSs both before and after treatment, solution treatment resulted in greater compactness in passive films, leading to lower carrier density, lower corrosion current density and better corrosion resistance.

show abstract

“…A recently emerged concept of coherent twin boundary (TB) is incorporated into the design for strengthening SSs [ 11 , 12 ]. TBs are special internal boundaries, in which strengthening is based on dislocation-TB interactions and the toughening is originated from the slips of partial dislocations along the coherent TBs [ 13 , 14 , 15 ]. Thereby, high-density twins with a finer spacing, especially down to the nanometer scale, can lead to a significant enhancement of flow strength and improvement of ductility.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Evolution and Mechanical Properties of Austenite Stainless Steel with Gradient Twinned Structure by Surface Mechanical Attrition Treatment

et al. 2021

View full text Add to dashboard Cite

Gradient structures in engineering materials produce an impressive synergy of strength and plasticity, thereafter, have recently attracted extensive attention in the material families. Gradient structured stainless steels (SS) were prepared by surface mechanical attrition treatment (SMAT) with different impacting velocities. The microstructures of the treated samples are characterized by gradient twin fraction and phase constituents. Quantitative relations of gradient microstructure with impacting time and mechanical properties are analyzed according to the observations of SEM, TEM, XRD, and tests of mechanical property. The processed SSs exhibited to be simultaneously stiff, strong, and ductile, which can be attributed to the co-operation of the different spatial distributions of multi-scaled structures. The formation of gradient twinned structure is resolved and the strengthening by gradient structure is explored.

show abstract

Grain character and mechanical properties of Fe-21Cr-15Ni-6Mn-Nb non-magnetic stainless steel after solution treatment

Cited by 18 publications

References 47 publications

The Effect of Aging on Precipitates, Mechanical and Magnetic Properties of Fe-21Cr-15Ni-6Mn-Nb Low Magnetic Stainless Steel

The Effect of Aging on Precipitates, Mechanical and Magnetic Properties of Fe-21Cr-15Ni-6Mn-Nb Low Magnetic Stainless Steel

Corrosion Behaviors of Fe-22Cr-16Mn-0.55N High-Nitrogen Austenitic Stainless Steel in 3.5% NaCl Solution

Microstructure Evolution and Mechanical Properties of Austenite Stainless Steel with Gradient Twinned Structure by Surface Mechanical Attrition Treatment

Contact Info

Product

Resources

About