Application of software for determination of mechanical properties of metal materials under multi-transition deformation

Author(s):  
V.V. Galkin ◽  
S.A. Mantserov ◽  
D.O. Dudnikov ◽  
N.A. Ogurtsov

The application of software for determining of the mechanical properties of metallic materials under conditions of multi-junction deformation is considered. The composition of the software and the tasks to be performed: the determination of the stress-strain state using software systems, the quantitative calculation of the structure parameters and the assessment of the mechanical properties of the material using the developed computer programs are clarified. Technological solutions for determining of the strain hardening of low-carbon steels during cold upsetting and the recrystallization process assessment of austenitic steel during free forging are presented.

2013 ◽  
Vol 651 ◽  
pp. 163-167
Author(s):  
Shu Rui Li ◽  
Xue Min Wang ◽  
Xin Lai He

The influence of Ti oxide on the toughness of heat affected zone for low carbon bainitic steels has been investigated. The optical microscope, SEM and TEM were used to analyze the composition, size and distribution of the inclusions, and the microstructure and mechanical properties after welding thermal simulation were also investigated. The effect of Ti oxide inclusion on the transformation of acicular ferrite has also been studied. The results show that after the melting with Ti dioxide technique the inclusion is complex, in the core is Ti oxides about 1-3 micron and around it is MnS. It has been found the acicular ferrite can nucleate at the inclusions and the Ti oxide inclusion will promote the nucleation of acicular ferrite, and the acicular ferrite will block the growth of bainite. Therefore by introducing the Ti oxide in the steels the microstructure of HAZ could be refined markedly therefore the toughness of HAZ can be improved evidently.


2015 ◽  
Vol 48 (2) ◽  
pp. 73-81 ◽  
Author(s):  
Henrique Duarte Alvarenga ◽  
Nele Van Steenberge ◽  
Chris Xhoffer ◽  
Patrick Steegstra ◽  
Jilt Sietsma ◽  
...  

1988 ◽  
Vol 74 (12) ◽  
pp. 2323-2329 ◽  
Author(s):  
Masahiko ODA ◽  
Hiroshi KUBO ◽  
Osamu AKISUE ◽  
Kichi NAKAZAWA

2015 ◽  
pp. 405-437

Abstract Steels with martensitic and tempered martensitic microstructures, though sometimes perceived as brittle, exhibit plasticity and ductile fracture behavior under certain conditions. This chapter describes the alloying and tempering conditions that produce a ductile form of martensite in low-carbon steels. It also discusses the effect of tempering temperature on the mechanical behavior and deformation properties of medium-carbon steels.


Author(s):  
Brandt J. Ruszkiewicz ◽  
Tyler Grimm ◽  
Ihab Ragai ◽  
Laine Mears ◽  
John T. Roth

Increasingly strict fuel efficiency standards have driven the aerospace and automotive industries to improve the fuel economy of their fleets. A key method for feasibly improving the fuel economy is by decreasing the weight, which requires the introduction of materials with high strength to weight ratios into airplane and vehicle designs. Many of these materials are not as formable or machinable as conventional low carbon steels, making production difficult when using traditional forming and machining strategies and capital. Electrical augmentation offers a potential solution to this dilemma through enhancing process capabilities and allowing for continued use of existing equipment. The use of electricity to aid in deformation of metallic materials is termed as electrically assisted manufacturing (EAM). The direct effect of electricity on the deformation of metallic materials is termed as electroplastic effect. This paper presents a summary of the current state-of-the-art in using electric current to augment existing manufacturing processes for processing of higher-strength materials. Advantages of this process include flow stress and forming force reduction, increased formability, decreased elastic recovery, fracture mode transformation from brittle to ductile, decreased overall process energy, and decreased cutting forces in machining. There is currently a lack of agreement as to the underlying mechanisms of the electroplastic effect. Therefore, this paper presents the four main existing theories and the experimental understanding of these theories, along with modeling approaches for understanding and predicting the electroplastic effect.


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