scholarly journals Hot Workability of the as-Cast 21Cr Economical Duplex Stainless Steel Through Processing Map and Microstructural Studies Using Different Instability Criteria

2017 ◽  
Vol 30 (11) ◽  
pp. 1080-1088 ◽  
Author(s):  
Jing Han ◽  
Jia-Peng Sun ◽  
Ying Han ◽  
Huan Liu
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Processing Map ◽  
Hot Workability ◽  
Instability Criteria ◽  
Microstructural Studies

The effect of rare earth alloying on the hot workability of duplex stainless steel — A study using processing map

2015 ◽  
Vol 86 ◽  
pp. 848-854 ◽  
Author(s):  
Xiaocong Ma ◽  
Zijun An ◽  
Lei Chen ◽  
Tianqiao Mao ◽  
Jianfeng Wang ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Rare Earth ◽  
Duplex Stainless Steel ◽  
Processing Map ◽  
Hot Workability

Reliability of Processing Map and Influence of Sigma Phase Precipitation on Hot Workability of Duplex Stainless Steel

2020 ◽  
Vol 20 (7) ◽  
pp. 4509-4512
Author(s):  
Jae-Yeol Jeon ◽  
Cheol-Woo Kim ◽  
Hyo-Sang Yoo ◽  
Jae-Ik Cho ◽  
Dae-Geun Kim
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Processing Map ◽  
Strain Rates ◽  
Deformation Characteristics ◽  
Hot Workability ◽  
Phase Precipitation ◽  
Tem Analysis ◽  
Hot Compression Test ◽  
Working Region

The hot deformation characteristics of an UNS No. S32205 grade duplex stainless steel with nitrogen content of 0.17 ms% was studied over the ranges of temperature from 800 to 1200 °C and strain rates from 0.001 to 1.0 s−1 at the total strain of 0.5 by the hot compression test to draw the processing map. The obtained map was discussed in combinations of microstructural observations and TEM analysis. The optimum hot working region is the temperatures from 950 to 1200 °C regardless of the strain rates without cracks and sigma precipitates.

Effect of strain rate and temperature on hot workability and flow behaviour of duplex stainless steel

2016 ◽  
Vol 43 (2) ◽  
pp. 88-96 ◽  
Author(s):  
M. Ma ◽  
H. Ding ◽  
Z. Tang ◽  
J. Zhao ◽  
Z. Jiang ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Strain Rate ◽  
Duplex Stainless Steel ◽  
Flow Behaviour ◽  
Hot Workability

NiAl precipitation in Fe-12w/o Cr-5w/o Ni-4w/o Al

1983 ◽  
Vol 41 ◽  
pp. 202-203
Author(s):  
L.E. Murr ◽  
J.S. Dunning ◽  
S. Shankar
Keyword(s):  
Solid Solution ◽  
Stainless Steel ◽  
Stainless Steels ◽  
Alloy Composition ◽  
Chromium Content ◽  
Scale Up ◽  
Optical Metallography ◽  
Property Evaluation ◽  
310 Stainless Steel ◽  
Microstructural Studies

Aluminum additions to conventional 18Cr-8Ni austenitic stainless steel compositions impart excellent resistance to high sulfur environments. However, problems are typically encountered with aluminum additions above about 1% due to embrittlement caused by aluminum in solid solution and the precipitation of NiAl. Consequently, little use has been made of aluminum alloy additions to stainless steels for use in sulfur or H2S environments in the chemical industry, energy conversion or generation, and mineral processing, for example.A research program at the Albany Research Center has concentrated on the development of a wrought alloy composition with as low a chromium content as possible, with the idea of developing a low-chromium substitute for 310 stainless steel (25Cr-20Ni) which is often used in high-sulfur environments. On the basis of workability and microstructural studies involving optical metallography on 100g button ingots soaked at 700°C and air-cooled, a low-alloy composition Fe-12Cr-5Ni-4Al (in wt %) was selected for scale up and property evaluation.

Identification by Electron Microdiffraction of Intermetallic Phases in a Duplex Stainless Steel

1990 ◽  
Vol 48 (2) ◽  
pp. 494-495
Author(s):  
A. Redjaïmia ◽  
J.P. Morniroli ◽  
G. Metauer ◽  
M. Gantois
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Convergent Beam Electron Diffraction ◽  
Intermetallic Phases ◽  
Small Particles ◽  
Parallel Beam ◽  
Diffraction Patterns ◽  
Average Size ◽  
Convergent Beam ◽  
Electron Microdiffraction

2D and especially 3D symmetry information required to determine the crystal structure of four intermetallic phases present as small particles (average size in the range 100-500nm) in a Fe.22Cr.5Ni.3Mo.0.03C duplex stainless steel is not present in most Convergent Beam Electron Diffraction (CBED) patterns. Nevertheless it is possible to deduce many crystal features and to identify unambiguously these four phases by means of microdiffraction patterns obtained with a nearly parallel beam focused on a very small area (50-100nm).From examinations of the whole pattern reduced (RS) and full (FS) symmetries the 7 crystal systems and the 11 Laue classes are distinguished without ambiguity (1). By considering the shifts and the periodicity differences between the ZOLZ and FOLZ reflection nets on specific Zone Axis Patterns (ZAP) which depend on the crystal system, the centering type of the cell and the glide planes are simultaneously identified (2). This identification is easily done by comparisons with the corresponding simulated diffraction patterns.

Sign in / Sign up

Export Citation Format

Share Document