Texture Analysis of the Hot Rolling Austenitic Cr-Ni Steel Using Neutron Diffraction Method

Priyanto, Tri Hardi; Effendi, Nurdin; Parikin,

doi:10.4028/www.scientific.net/AMR.1123.104

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HomeAdvanced Materials ResearchAdvanced Materials Science and Technology IITexture Analysis of the Hot Rolling Austenitic...

Texture Analysis of the Hot Rolling Austenitic Cr-Ni Steel Using Neutron Diffraction Method

Abstract:

Synthesis of austenite stainless steel using extracted minerals from Indonesian mines has been carried out. It is namely A2 steel. The main raw material of making non standard steel A2 is granular scrap iron, nickel, iron-chromium, iron-manganese, and iron-silicon. It is obtained from non standards. A component of A2 steel consists of 15,42%Cr, 25,01%Ni, 0,32%Mn, 0,96%Si and 0,34%C with impurities of 0,039%V and 0,051%Cu. Characterization using neutron diffraction technique shows the first four Bragg peaks of (111), (200), (220) and (311). A machining process was performed to make a plat from ingot. After the machining process, intensities and FWHM of the first two Bragg peaks of (111) and (200) are quite the same. But the intensity of the peaks (220) and (311) changes. It is calculated that for (220)peak the decreasing intensity about 51.6% and increasing FWHM about 0.14%, whereas for (311) peak the intensity increase about 40.2% and the FWHM decrease about 3%. Furthermore, the material obtained from the machining process is used as a reference to the condition of the material without rolling. After being subjected to rolling up to 70% thickness reduction, crystal orientation changes from highest intensity with a sequence of (200), (111) and (220) to (220) (111) and (200) with highest increasing intensity about 2.25 times at (220). Quantitative analysis of texture after the rolling process is shown in pole figures of (111), (200) and (220). It is characterized that crystals are oriented mainly to {110} <113>, texture index is 1.0671.

Info:

Periodical:

Advanced Materials Research (Volume 1123)

Main Theme:

Advanced Materials Science and Technology II

Edited by:

Risa Suryana, Kuwat Triyana, Khairurrijal, Heru Susanto and Sutikno

Pages:

104-108

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1123.104

Citation:

T. H. Priyanto et al., "Texture Analysis of the Hot Rolling Austenitic Cr-Ni Steel Using Neutron Diffraction Method", Advanced Materials Research, Vol. 1123, pp. 104-108, 2015

Online since:

August 2015

Authors:

Tri Hardi Priyanto *, Nurdin Effendi, Parikin

Keywords:

Austenitic Stainless Steel, Neutron Diffraction, Texture

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33,00 €

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4714

The Characteristic of Surface Layers on Austenitic Stainless Steel after Glow-Discharge Nitriding Process

Authors: Artur Sitko, Marek Szkodo, Maria Gazda

Abstract: This paper presents investigation of surface layers. The diffusion layers were produced by using different parameters of reactive atmosphere (N2:H2). The research of the surface layers was performed using scanning electron microscope (SEM). The results of energy dispersive X-ray (EDX) analysis and X-ray diffraction (XRD) analysis are presented. Research reveals the influence of chemical constitution of reactive atmosphere on the change of properties of nitrided layers.

165

The Research of Controlled Rolling and Cooling Process in X70 Grade Pipeline Steel with Vanadium Microalloying

Authors: Xiao Yu Ye, Kai Hua Zhang, Jun Zuo

Abstract: In Formastor-Ⅱ thermal expansion phase transition instrument, determine test steel's thermal expansion curves with different cooling rates during continuous cooling. Using thermal expansion combined with metallographic-hardness method to draw the continuous cooling transformation curve (CCT).According to the test results draft thermal simulation program, in Gleele-3500 thermal simulation test machine, conduct thermal simulation experiment for vanadium microalloying X70 grade pipeline steel at different deformation temperature, deformation extent and coiling temperature. Analysis that the microstructure was influenced by different rolling process.The results showed that: in industrial production, the experiment steel's rough rolling temperature should be controlled more than 1020°C, finishing temperature controlled in 820±20°C and coiling temperature controlled in 500～530°C to obtain acicular ferrite.

1033

Microstructure Evolution during Annealing Treatment of Austenitic Stainless Steels

Authors: Clara Herrera, Angelo Fernando Padilha, R.L. Plaut

Abstract: Austenitic stainless steels of the AISI 304 and 316 grades, amongst over other hundred compositions of stainless steels available in the market, are the most frequently used ones worldwide. They are selected for numerous applications due to their favorable combination of characteristics such as low price, moderate to good corrosion resistance, excellent ductility and toughness along with good weldability. Their major limitation is in the yield strength, which is relatively low (about 200 MPa), in the annealed condition. Through cold working, this value can be easily multiplied by a factor of up to six, however ductility drops. The cold worked sub-structure of the austenitic stainless steels is formed by a planar array of dislocations and strain induced martensites, α (BCC) and ε (HCP). The microstructure evolution of austenitic stainless steels, AISI 304L and 316L, during cold rolling and subsequent annealing was studied (maximum thickness reduction - 90%). Samples were initially solution annealed at 1100°C for one hour with subsequent water quenched. Following, they have been cold rolled at room temperature, with cold reductions varying between 10 and 90%. After rolling, samples with approximately 90% thickness reduction have been submitted to annealing treatments in order to study martensite reversion, recovery and recrystallization. Annealing treatments have been performed between 200 and 900°C, with 100°C interval for one hour. The resulting microstructures were investigated by optical microscopy, scanning electron microscopy (with EBSD), magnetic measurements and hardness evaluation. As received (hot rolled) austenitic stainless steel sheet presented recrystallized equiaxial grains with austenite and islands of delta ferrite, in larger quantities mainly in the centre of the sheet. The solution annealing at 1100°C for one hour eliminated delta ferrite. During rolling, the austenite partially transforms into α martensite. The 50% αmartensite reversion temperature is close to 550°C for both steels. This temperature is practically independent of the amount of αmartensite present in the steel. The 50% recrystallization temperature of the 304L steel is lower than that of the 316L steel, about 700 and 800°C, respectively. The 316L steel shows a higher recrystallization resistance, due to its higher SFE and lower storage deformation energy than the 304L steel. Recrystallization temperature is about 150°C higher that the αmartensite reversion temperature. The percentage of αmartensite has a strong influence on the recrystallized grain size, the higher the percentage of this phase the smaller will be the grain size.

913

The Effect of Cold Asynchronous Rolling Technique on High Manganese Steel Mn13

Authors: Xiao Hua Sun, Chang Ming Qiu, Yan Feng Wang, Li Deng

Abstract: High manganese steel is a wear-resisting steel. With the rapidly development of industry, it is very important to improve the wear resistance of high manganese steel. We do some experiments with cold asynchronous rolling technique on austenitic high manganese steel.The results show that hardness and impact abrasion resistance are enhanced greatly with the increase of deformation, and the toughness not decrease to very low.

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