2013
DOI: 10.1007/s11665-013-0619-7
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On Microstructure and Microhardness of Isothermally Aged UNS S32760 and the Effect on Toughness and Corrosion Behavior

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Cited by 13 publications
(6 citation statements)
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“…However, its main drawback is the tendency to form detrimental phases at temperatures between 600 • C and 900 • C, being the cause of a significant loss of toughness and resistance to localized corrosion. One of the most known and representative detrimental phases is the precipitation of the sigma phase (σ), a Cr-and Mo-rich intermetallic compound [12][13][14][15][16][17][18][19][20][21]. This σ phase shows a tetragonal crystallographic structure with 32 atoms per unit cell [22] making possible a considerable increase in the resultant hardness, whereas a decrease in the toughness as well as elongation is also observed [23][24][25][26][27].…”
Section: Introductionmentioning
confidence: 99%
“…However, its main drawback is the tendency to form detrimental phases at temperatures between 600 • C and 900 • C, being the cause of a significant loss of toughness and resistance to localized corrosion. One of the most known and representative detrimental phases is the precipitation of the sigma phase (σ), a Cr-and Mo-rich intermetallic compound [12][13][14][15][16][17][18][19][20][21]. This σ phase shows a tetragonal crystallographic structure with 32 atoms per unit cell [22] making possible a considerable increase in the resultant hardness, whereas a decrease in the toughness as well as elongation is also observed [23][24][25][26][27].…”
Section: Introductionmentioning
confidence: 99%
“…It happened due to the growth of austenite grains followed by their union. This process results in massive austenite and consequently in a heterogeneous microstructure [47][48][49] .…”
Section: Resultsmentioning
confidence: 99%
“…The assays of corrosion by DL-EPR were performed in a solution composed of 1 M H 2 SO 4 + 0.5 M NaCl + 0.01 M KSCN at 25°C. This choice was based on the study of Zhao et al 43 , that successfully assessed the intergranular corrosion of LDX 2404 DSS 2404 aged at 700 o C. The curves by DL-EPR were obtained by the scan of the potential from -0.5 to 0.2V, and the scan was reversed and scanned from positive to negative potentials until -0.5V at a constant rate of 1.67mV/s 36,[44][45][46][47][48] .…”
Section: Methodsmentioning
confidence: 99%
“…Similarly, the specimens of FSS and SASS constituent' steels, were also isothermally heat treated for the formation of secondary precipitates at the lower and higher temperature ranges as shown in Table 3 and Table 4, respectively. Based on TTT diagrams of the austenitic and ferritic steels [18] [19], a scheme for the isothermal heat treatment conditions applied on the composite and the two constituent's steels is shown in Figure 1.…”
Section: Heat Treatmentmentioning
confidence: 99%