Modern State of Nondestructive Testing of Mechanical Properties and Stamping Ability of Steel Sheets in a Manufacturing Technological Flow

Bending behavior occurs in the hot press forming process, resulting in many cases of failure during forming. To address the problem of cracking and improve the formability and mechanical properties of boron steel sheets in the bending process, an experiment has been carried out by using a spring compound bending die. Also, a comparison has been made between the traditional U-bending die and the spring compound bending die with regard to formability. The influence of the parameters for hot press forming such as the heating temperature, punch speed, and die radii on the mechanical properties and microstructure was analyzed by tension testing and metallographic observations.

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Asymmetric rolling of interstitial free steel sheets: Microstructural evolution and mechanical properties

Journal of Manufacturing Processes ◽

10.1016/j.jmapro.2017.12.014 ◽

2018 ◽

Vol 31 ◽

pp. 583-592 ◽

Cited By ~ 12

Author(s):

Saeed Tamimi ◽

Jose J. Gracio ◽

Augusto B. Lopes ◽

Said Ahzi ◽

Frederic Barlat

Keyword(s):

Mechanical Properties ◽

Microstructural Evolution ◽

Interstitial Free ◽

Asymmetric Rolling ◽

Steel Sheets ◽

Interstitial Free Steel

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Effects of temperature on interfacial evolution and mechanical properties of pure titanium and carbon steel sheets bonded via new multi-pass continuous hot-roll diffusion with nickel interlayer

10.21203/rs.3.rs-357340/v1 ◽

2021 ◽

Author(s):

Chun-Ming Jimmy Lin ◽

Mohsen Saboktakin Rizi ◽

Chia-Kai Chen

Keyword(s):

Mechanical Properties ◽

Carbon Steel ◽

Pure Titanium ◽

Engineering Application ◽

Peel Strength ◽

Processing Temperature ◽

Diffusion Treatment ◽

Steel Sheets ◽

New Type ◽

Interfacial Evolution

Abstract This study performed experiments and thermodynamic calculations to elucidate the effects of diffusion temperature on interfacial evolution and mechanical properties of pure titanium and carbon steel (i.e., steel) sheets bonded via a new type of multi-pass continuous hot-roll diffusion with nickel interlayer. The interfacial evolution results revealed that this new type of multi-pass continuous hot-roll diffusion treatment showed a very good adherence due to its metallurgy bonding, because it made a remarked improve to between compound and intermetallic compounds relationship. Secondly, in mechanical properties results revealed that the highest shear strength (∼470 MPa) was obtained at a processing temperature of 850°C. The highest peel strength (∼21 N/mm) was obtained in the sample processed at 900°C. Bonding temperatures above and below these levels reduced the bond strength respectively due to poor atom diffusion and excessive compound formation, resulting in joint failure at the Ti-Ni interface. Extensive cleavage planes with various alignments were observed on the fracture surfaces in these cases. Overall, a hot-rolling temperature of 850°C was found to provide the optimal tradeoff between interfacial bonding strength and ductility. This work provided an economical and convenient solution for broadening the engineering application of interface between sheets of pure titanium and steel.

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Effects of Atomizing Gas on Microstructural Characteristics and Mechanical Properties of Spray Formed High Si Steels

Materials Science Forum ◽

10.4028/www.scientific.net/msf.620-622.57 ◽

2009 ◽

Vol 620-622 ◽

pp. 57-60

Author(s):

Je Sik Shin ◽

Bong Hwan Kim ◽

J.G. Lee ◽

Seung Y. Shin ◽

Gwang Bo Choi ◽

...

Keyword(s):

Mechanical Properties ◽

Spray Forming ◽

Forming Process ◽

Microstructural Characteristics ◽

Steel Sheets ◽

Conventional Ingot ◽

Cold Workability ◽

Ingot Cast

In order to investigate the feasibility of spray forming process for production of high Si steel sheets, 4.8~6.4%Si steels were prepared by spray forming process using N2 and Ar gases and their cold workability was compared with that of conventional ingot cast samples. Atomizing gas affected significant effect on deposit features, microstructural characteristics and mechanical properties of the spray formed high Si steels.

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