Effect of directional anisotropy on mechanical properties of 9Cr Ferritic/ Martensitic ODS steels processed by mechanical alloying and powder forging

被引：10
作者：
Rajulapati, Sunil Kumar [1 ,2 ]
Gaikwad, S. D. [1 ]
Dabhade, Vikram. V. [1 ]
Prakash, Ujjwal [1 ]
机构：
[1] Indian Inst Technol, Dept Met & Mat Engn, Roorkee 247667, India
[2] Natl Inst Technol Andhra Pradesh, Dept Met & Mat Engn, Tadepalligudem 534101, India
来源：
MATERIALS TODAY COMMUNICATIONS | 2023年 / 37卷
关键词：
Powder forging; ODS steel; Powder metallurgy; Mechanical properties; Mechanical alloying; ISOSTATIC-PRESSING TEMPERATURE; DISPERSION-STRENGTHENED STEELS; FERRITIC/MARTENSITIC STEEL; OXIDE PARTICLES; MICROSTRUCTURE; TENSILE; CONSOLIDATION; FABRICATION; STRESS; ENERGY;
D O I：
10.1016/j.mtcomm.2023.107220
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The present work investigates the feasibility of the powder forging route as a novel approach for the consolidation of oxide dispersion strengthened (ODS) steel powders. Mechanically alloyed powder of the composition Fe-9Cr-2 W-0.2Ti-0.12 C-0.35Y2O3 was filled in a mild steel can and loose sintered in a reducing atmosphere at 1200 degrees C after which it was forged in a channel die using a friction screw forging machine. The forged ODS steel was investigated in terms of residual porosity, microstructure, hardness and tensile properties. Density as well as hardness variation was determined along both the forging directions, i.e., longitudinal and transverse. In the transverse direction density, hardness and tensile strength was slightly higher as compared to that in the longitudinal direction. Powder forging led to the elimination of the prior particle boundaries (PPB) network in the final forged slab. Further, near isotropic mechanical properties and homogeneous chemical composition were obtained throughout the forged sample. The proposed powder forging route has significant potential as an alternative consolidation process to hot isostatic pressing (HIP) and hot extrusion to produce ODS steel for nuclear applications.
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页数：14
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