scholarly journals Effects of Microalloying on Stretch-flangeability of Ultrahigh-strength TRIP-aided Martensitic Steel Sheets

2014 ◽  
Vol 54 (8) ◽  
pp. 1943-1951 ◽  
Author(s):  
Duc Van Pham ◽  
Junya Kobayashi ◽  
Koh-ichi Sugimoto
Keyword(s):  
Martensitic Steel ◽  
Steel Sheets ◽  
Ultrahigh Strength

Press-Shaving Characteristics of Ultrahigh-Strength Steel Sheets

2013 ◽  
Vol 554-557 ◽  
pp. 1879-1886 ◽  
Author(s):  
Masao Murakawa ◽  
Kenta Nakamura ◽  
Tomio Shionome ◽  
Fumitoshi Komuro ◽  
Giichirou Muro ◽  
...  
Keyword(s):  
Surface Quality ◽  
New Technologies ◽  
High Strength ◽  
Process Conditions ◽  
Steel Sheets ◽  
Ultrahigh Strength ◽  
Ultrahigh Strength Steel ◽  
Experimental Researches ◽  
Very High

The paper proposes new technologies able to improve the surface quality in the case of press-shaving applied to very high strength materials. Experimental researches were developed and the best combination of process conditions was identified.

Resistance spot weldability of 11Cr–ferritic/martensitic steel sheets

2012 ◽  
Vol 421 (1-3) ◽  
pp. 132-139 ◽  
Author(s):  
Tomoyuki Uwaba ◽  
Yasuhide Yano ◽  
Masahiro Ito
Keyword(s):  
Martensitic Steel ◽  
Resistance Spot ◽  
Steel Sheets

scholarly journals V-bendability of Ultrahigh Strength Low Alloy TRIP-aided Steel Sheets with Bainitic Ferrite Matrix

2021 ◽  
Vol 107 (2) ◽  
pp. 165-174
Author(s):  
Akihiko Nagasaka ◽  
Tomohiko Hojo ◽  
Yuki Shibayama ◽  
Masaya Fujita ◽  
Takumi Ohashi ◽  
...  
Keyword(s):  
Bainitic Ferrite ◽  
Ferrite Matrix ◽  
Steel Sheets ◽  
Ultrahigh Strength

scholarly journals Smooth Hole Piercing of Ultrahigh-strength Steel Sheets by Means of Press-shaving

2016 ◽  
Vol 57 (663) ◽  
pp. 366-368
Author(s):  
Akira HARAI ◽  
Manabu SUZUKI ◽  
Akira MATSUMOTO ◽  
Fumitoshi KOMURO ◽  
Tomio SHIONOME ◽  
...  
Keyword(s):  
Steel Sheets ◽  
Ultrahigh Strength ◽  
Ultrahigh Strength Steel

High carbon microalloyed martensitic steel with ultrahigh strength-ductility

2016 ◽  
Vol 663 ◽  
pp. 151-156 ◽  
Author(s):  
Shengwei Qin ◽  
Yu Liu ◽  
Qingguo Hao ◽  
Ying Wang ◽  
Nailu Chen ◽  
...  
Keyword(s):  
Martensitic Steel ◽  
High Carbon ◽  
Ultrahigh Strength ◽  
Carbon Microalloyed

Analysis of Laser Weldments for Dual-Phase and Martensitic Steel Sheets for Automotive Applications

2014 ◽  
Vol 353 ◽  
pp. 8-12
Author(s):  
Young Nam Ahn ◽  
Min Jung Kang ◽  
Cheol Hee Kim
Keyword(s):  
Tensile Strength ◽  
Shear Strength ◽  
Heat Affected Zone ◽  
Martensitic Steel ◽  
Dual Phase ◽  
Tensile Shear Strength ◽  
Automotive Applications ◽  
Tensile Shear ◽  
Steel Sheets ◽  
Base Materials

Laser weldability was investigated for advanced high-strength steel sheets for automotive applications. Dual-phase steel (DP780) and martensitic steel (MS1300) sheets were employed as base materials; laser-butt and overlap welding experiments were conducted on combinations of steels with similar and dissimilar strength. The tensile strength and metallurgical morphology were analysed for the butt-welded specimens; tensile-shear strength and bead shapes were analysed for the overlap-welded specimens. Even with laser welding, martensite in the heat-affected zone disintegrated and resulted in a softened, heat-affected zone as compared with the base materials. The tensile strength of a butt weldment was determined by the strength of the heat-affected zone. The tensile-shear strength of an overlap weldment was determined by not only the strength of the heat-affected zone but also bead shapes such as blow holes, underfill, and the bead width at the faying surface.

scholarly journals Precision Piercing and Blanking of Ultrahigh-strength Steel Sheets

2014 ◽  
Vol 81 ◽  
pp. 1114-1120 ◽  
Author(s):  
Masao Murakawa ◽  
Manabu Suzuki ◽  
Tomio Shionome ◽  
Fumitoshi Komuro ◽  
Akira Harai ◽  
...  
Keyword(s):  
Steel Sheets ◽  
Ultrahigh Strength ◽  
Ultrahigh Strength Steel
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