Effect of work-hardening on the fine structure of heat-resistant austenitic steels

1960 ◽  
Vol 2 (6) ◽  
pp. 315-317
Author(s):  
M. L. Bernshtein ◽  
Chu Jih-Chang
Keyword(s):  
Fine Structure ◽  
Work Hardening ◽  
Austenitic Steels ◽  
Heat Resistant

scholarly journals Fine Structure of Shear Bands Formed during Hot Deformation of Two Austenitic Steels

2004 ◽  
Vol 45 (7) ◽  
pp. 2157-2164 ◽  
Author(s):  
Pavel Cizek ◽  
Fang Bai ◽  
W.Mark Rainforth ◽  
John H. Beynon
Keyword(s):  
Fine Structure ◽  
Hot Deformation ◽  
Shear Bands ◽  
Austenitic Steels

Grain Refinement and Mechanical Properties of a Metastable Austenitic Fe-Cr-Ni-Mn Alloy

2005 ◽  
Vol 475-479 ◽  
pp. 43-48 ◽  
Author(s):  
Yunqing Ma ◽  
Jae Eun Jin ◽  
Young Kook Lee
Keyword(s):  
Grain Size ◽  
Work Hardening ◽  
High Strength ◽  
Austenitic Steels ◽  
Nano Materials ◽  
Fundamental Research ◽  
Cold Rolled ◽  
Austenite Grains ◽  
Hot Rolled ◽  
Conventional Rolling

A lot of works for developing the structural nano-materials have been performed all over the world in recent years. Severe deformation techniques like HPT, ECPA and ARB have been applied to different materials such as Al, Cu, Ti and several steels. Such techniques greatly reduced the grain size and improved the yield and tensile strengths. However, the elongation of the materials is greatly decreased due to the small amount of work hardening, and these techniques do not seem suitable for the mass production. Therefore, this study has been carried out as a fundamental research for developing austenitic steels with high strength and good elongation using a conventional rolling and annealing processes. Fe-0.1%C-10%Cr-5%Ni-8%Mn alloy was melted, homogenized, hot rolled, and cold rolled at room temperature to transform γ austenite to α ’ martensite. After that, the specimens were annealed just above its reverse transformation finish temperature (Af) to obtain the fine reversed austenite grains. The grain size of the metastable austenitic steel was successfully refined to less than 200nm by repeating rolling and annealing processes. The resultant nanocrystalline material shows not only high strength but also large elongation because the work hardening ability is enhanced by the strain-induced martensitic transformation during the tensile test.

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