Effect of reactor radiation on the relationship between the heat resistance characteristics of austenitic stainless steel

The paper presents selected aspects of analysis cold micro-forging process of a screw made of austenitic stainless steel, concerning relation between strain and hardness. Strain hardening character of a material in consecutive forming operations was analyzed experimentally by the measurement of hardness distribution made on longitudinal axial sections of screws. The relationship between hardness and effective strain (hardness curve) was determined, which made it possible to obtain strain distributions in different regions of a material subjected to cold deformation on the basis of strain distribution numerically estimated with FEM simulation performed using QForm2D/3D commercial software. Conclusions were formulated concerning strain inhomogeneity and strain-hardening intensity with respect to the correlation between strain and hardness. It was also concluded, that nonuniformity of hardening rate in a bulk can lead to local variations in flow stress and eventually, to occurrence of the metal flow related defects, which was illustrated with a case study of cold heading of self-tapping screw of AISI 304Cu stainless steel, with large head diameter to shank diameter ratio. In order to validate the obtained results, the same method was used for analysis of hardness development in steel 19MnB4.

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A Study on Chip Breakage in Mini-Pore Vibration Drilling for Hard-to-Cut Material of Austenitic Stainless Steel

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.455.548 ◽

2010 ◽

Vol 455 ◽

pp. 548-552

Author(s):

J.S. Zhou ◽

Bang Yan Ye ◽

Xing Yu Lai

Keyword(s):

Stainless Steel ◽

Austenitic Stainless Steel ◽

Cutting Parameters ◽

Processing Parameters ◽

Chip Breaking ◽

Vibration Drilling ◽

On Chip ◽

Vibration Parameters ◽

The Relationship ◽

Chip Breakage

This research aims to improve the method of Mini-pore Drilling superimposed an axis vibration for hard-to-cut material of Austenitic Stainless Steel 1Cr18Ni9Ti, as well as to make it easier for the chips to be discharged. A mathematical model of vibration drilling is presented, and the relationship between the vibration parameters and cutting parameters to generate little and short broken-chips in vibration drilling is investigated, analyzed and verified by experiments. The results show that when the processing parameters meet the conditions given in this article, stable and reliable chip-breaking can be achieved. The results provide a theoretical guidance to achieve chip-breaking in mini-pore vibration drilling for hard-to-cut material.

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On Time-Temperature Parameters for Correlation of Creep-Rupture Data in Stainless Steel Weldments

Journal of Engineering Materials and Technology ◽

10.1115/1.3443497 ◽

1978 ◽

Vol 100 (3) ◽

pp. 319-332 ◽

Cited By ~ 7

Author(s):

W. E. White ◽

Iain Le May

Keyword(s):

Stainless Steel ◽

Austenitic Stainless Steel ◽

Creep Rate ◽

Creep Rupture ◽

Rupture Time ◽

Function Approach ◽

Secondary Creep ◽

Rupture Data ◽

The Relationship ◽

Secondary Creep Rate

The Manson-Haferd, Larson-Miller, and Orr-Sherby-Dorn time-temperature parameters were applied to creep-rupture data obtained from testing two batches of austenitic stainless steel weldments. It was found that none of these correlated the data satisfactorily. A new parameter, based on a modification of one proposed originally by Manson and by Goldhoff and Sherby, was found to adequately correlate the data. The Minimum-Commitment, Station-Function Approach of Manson and Ensign was also applied, the results of which supported those obtained from the analysis made using the parameters listed above. Finally, from the relationship between rupture-time and secondary creep-rate, it is suggested that the form of the rupture data may be useful in predicting the physical basis for creep.

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The relationship between sensitisation and small punch test behaviour in a high-nitrogen austenitic stainless steel at cryogenic temperatures

Fatigue & Fracture of Engineering Materials & Structures ◽

10.1046/j.1460-2695.2003.00606.x ◽

2003 ◽

Vol 26 (1) ◽

pp. 85-92 ◽

Cited By ~ 1

Author(s):

I. H. KWON ◽

S. I. LEE ◽

H. S. YU

Keyword(s):

Stainless Steel ◽

Austenitic Stainless Steel ◽

Cryogenic Temperatures ◽

Small Punch Test ◽

High Nitrogen ◽

Small Punch ◽

Punch Test ◽

The Relationship

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Investigation into the relationship between tool‐wear and cutting environments when milling an austenitic stainless steel and En32 low carbon steel

Industrial Lubrication and Tribology ◽

10.1108/00368790510583384 ◽

2005 ◽

Vol 57 (2) ◽

pp. 73-79

Author(s):

M. Stanford ◽

P.M. Lister

Keyword(s):

Stainless Steel ◽

Carbon Steel ◽

Austenitic Stainless Steel ◽

Tool Wear ◽

Low Carbon Steel ◽

Low Carbon ◽

The Relationship

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The Relationship between Quantitatively Evaluated Microstructure and Fracture Toughness on Austenitic Stainless Steel Weld Metal.

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A ◽

10.1299/kikaia.58.2094 ◽

1992 ◽

Vol 58 (555) ◽

pp. 2094-2098 ◽

Cited By ~ 2

Author(s):

Osamu KAMIYA ◽

Kazuo KUMAGAI ◽

Keiki IGARASHI

Keyword(s):

Fracture Toughness ◽

Stainless Steel ◽

Austenitic Stainless Steel ◽

Weld Metal ◽

Steel Weld ◽

Stainless Steel Weld ◽

Steel Weld Metal ◽

Stainless Steel Weld Metal ◽

Austenitic Stainless Steel Weld ◽

The Relationship

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The Formation of Fine-Grained Structure in S304H-Type Austenitic Stainless Steel during Hot-To-Warm Working

Materials Science Forum ◽

10.4028/www.scientific.net/msf.715-716.380 ◽

2012 ◽

Vol 715-716 ◽

pp. 380-385 ◽

Cited By ~ 6

Author(s):

Marina Tikhonova ◽

Valeriy Dudko ◽

Andrey Belyakov ◽

Rustam Kaibyshev

Keyword(s):

Stainless Steel ◽

Austenitic Stainless Steel ◽

Compression Tests ◽

Scale Level ◽

Single Pass ◽

Fine Grained ◽

Loading Direction ◽

Fine Grained Structure ◽

Multiple Compression ◽

The Relationship

The dynamic process of grain evolution in a Super304H austenitic stainless steel was studied in compression tests. The tests were carried out to a strain of 0.7 at temperatures ranging from 700 to 1000°C and strain rate of 10-3s-1. In addition to single pass compression the multiple compressions with changing the loading direction in 90o and decreasing the temperature with step of 100°C from 1000 to 700°C in each pass were utilized to achieve large cumulative strains. Under multiple compression the values of flow stresses were lower than those at single-pass compressions under the same temperatures. The fraction of dynamically recrystallized grains decreased from 1.0 to almost zero with decreasing temperature in single-pass compressions. On the other hand, almost fully recrystallized structure developed under conditions of multiple compressions. The size of dynamically recrystallized grains decreased with decreasing the deformation temperature, approaching a submicrometer scale level at 700°C. The relationship between the deformation conditions and operating mechanisms of dynamic recrystallization is discussed in some details.

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