scholarly journals EFFECT OF ELECTRIC CURRENT PULSE ON MECHANICAL PROPERTIES OF ULTRA-HIGH STRENGTH STEEL 1180CP

2018 ◽  
Vol 54 (5A) ◽  
pp. 82
Author(s):  
Nguyen Trung Thien
Keyword(s):  
Mechanical Properties ◽  
Electric Current ◽  
High Strength Steel ◽  
Uniform Elongation ◽  
High Strength ◽  
Single Pulse ◽  
Experimental Result ◽  
Pulse Electric Current ◽  
Ultra High Strength Steel ◽  
Pulse Electric

Effect of the pulse electric current on mechanical properties of an ultra-high strength steel (UHSS) is experimentally investigated. A single pulse of electric current with a short duration of 0.36 sec is applied to the specimen under tensile plastic loading. The experimental result showed that flow stress of the UHSS nearly instantly drops at moment of electric current, following strain hardening until necking of the specimen. Uniform elongation completely depends on the pulsing strain, while ultimate tensile strength slightly changes after electric current.

Microstructure and Mechanical Properties of Ultra-High Strength Steel Plates with High Deformability

2010 ◽  
Vol 638-642 ◽  
pp. 3266-3271 ◽  
Author(s):  
Byoung Chul Hwang ◽  
Chang Gil Lee ◽  
Sung Hak Lee
Keyword(s):  
Mechanical Properties ◽  
Low Temperature ◽  
High Strength Steel ◽  
Uniform Elongation ◽  
High Strength ◽  
Steel Plates ◽  
Ultra High Strength Steel ◽  
Temperature Transformation ◽  
High Deformability ◽  
Soft Ferrite

High deformability has been considered as a critical factor of ultra-high strength steel plates subjected to compressive, tensile, and bending deformation induced by large ground movements. In this paper, various dual phase microstructures consisting of soft ferrite and strong low-temperature transformation phases without deformation in the (austenite + ferrite) two-phase temperature region after controlled rolling were introduced and then the mechanical properties were discussed with emphasis on deformability such as yield ratio and uniform elongation. Ultra-high strength steel plates fabricated by a modified thermo-mechanical control process showed lower yield ratio of under 0.75 and higher uniform elongation of 5% as a minimum, as compared to commercial API X100 and X120 grade pipeline steels, without much sacrifice of Charpy impact properties because of an appropriate formation of soft ferrite and strong low-temperature transformation phases.

Study of processing, microstructure and mechanical properties of hot rolled ultra-high strength steel

2018 ◽  
Vol 46 (6) ◽  
pp. 535-541 ◽  
Author(s):  
Tihe Zhou ◽  
David Overby ◽  
Peter Badgley ◽  
Chris Martin-Root ◽  
Xiang Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Strength Steel ◽  
High Strength ◽  
Microstructure And Mechanical Properties ◽  
Ultra High Strength Steel ◽  
Hot Rolled
Sign in / Sign up

Export Citation Format

Share Document