scholarly journals The Relationship between Hydrogen Content and Delayed Fracture in the Surface Treatment of Spring Steel.

1993 ◽  
Vol 44 (3) ◽  
pp. 260-264
Author(s):  
Kenji ISHIJIMA ◽  
Harumi UENO ◽  
Haruhisa MURAKAMI ◽  
Kazuo NAKAJIMA ◽  
Masaru AKIZAWA ◽  
...  
Keyword(s):  
Surface Treatment ◽  
Hydrogen Content ◽  
Spring Steel ◽  
Delayed Fracture ◽  
The Relationship

Prediction of Springback in Metal Forming of Diaphragm of Automotive Horn Based on BPANN

2010 ◽  
Vol 139-141 ◽  
pp. 594-599
Author(s):  
Yan Qiu Zhang ◽  
Shu Yong Jiang ◽  
Yu Feng Zheng
Keyword(s):  
Young’S Modulus ◽  
Metal Forming ◽  
Young's Modulus ◽  
Steel Strip ◽  
Back Propagation ◽  
Spring Steel ◽  
Yield Ratio ◽  
Punch Radius ◽  
Cold Rolled ◽  
The Relationship

The spring steel strip 50CrVA which is cold rolled was applied to manufacture the diaphragm of the automotive horn by means of sheet metal forming. The combination of the experiments with back-propagation artificial neural network (BPANN) is used to solve the springback problem of the diaphragm. Experiments have shown that a 4-8-1 BPANN is able to predict the springback of the diaphragm successfully, and the network is able to model the relationship between the springback of the diaphragm and the process parameters rationally. BPANN simulation results and experimental ones have shown that the springback of the diaphragm is particularly influenced by such parameters as blank thickness, Young’s modulus, punch radius and yield ratio. Furthermore, the springback of the diaphragm decreases with the increase of blank thickness and Young’s modulus, but increases with the increase of punch radius and yield ratio.

scholarly journals The Effect of Heat and Surface Treatment on the Fatigue Behaviour of 56SiCr7 Spring Steel

2014 ◽  
Vol 74 ◽  
pp. 309-312 ◽  
Author(s):  
Roselita Fragoudakis ◽  
Stelios Karditsas ◽  
Georgios Savaidis ◽  
Nikolaos Michailidis
Keyword(s):  
Surface Treatment ◽  
Fatigue Behaviour ◽  
Spring Steel

scholarly journals Modeling the relationship between hydrogen content and mechanical property of Ti600 alloy by using ANFIS

2013 ◽  
Vol 37 (8) ◽  
pp. 5705-5714 ◽  
Author(s):  
Yuanfei Han ◽  
Weidong Zeng ◽  
Xuemin Zhang ◽  
Yongqing Zhao ◽  
Yu Sun ◽  
...  
Keyword(s):  
Mechanical Property ◽  
Hydrogen Content ◽  
The Relationship

Effect of heat treatment on the hydrogen delayed fracture of high strength spring steel

2013 ◽  
Vol 27 (10) ◽  
pp. 2991-2996 ◽  
Author(s):  
Yong-Jun Lee ◽  
Jun-Ho Park ◽  
Dong-Ho Lee ◽  
Sung-Su Kang
Keyword(s):  
Heat Treatment ◽  
High Strength ◽  
Spring Steel ◽  
Delayed Fracture

scholarly journals Description vs. Interpretation: The Attitudes of Traditional and Current Archaeology Towards the Problem of Impresso-Barbotine in the Early Neolithic

2016 ◽  
Vol 8 (3) ◽  
pp. 657
Author(s):  
Jasna Vuković
Keyword(s):  
Material Culture ◽  
Surface Treatment ◽  
Ceramic Ware ◽  
Future Research ◽  
Early Neolithic ◽  
Historical Method ◽  
Functional Classes ◽  
Chronological Sequence ◽  
Complex Forms ◽  
The Relationship

The problem of the relationship impresso-barbotine has been chosen here, as an excellent example to illustrate the tendencies and shortcomings of the Yugoslav/Serbian archaeology during the major part of the 20th century, as well as the results forming the base for future research and new conclusions. The impresso-barbotine problem has been recognized as one of the important aspects of research into the Early Neolithic as early as in the 1950s, and formed the base for the formation of several relative chronological system. However, although the culture-historical approach is based upon detailed description and stylistic-typological analyses, these phenomena are defined and described in a number of different ways (if at all), causing great confusion. The highly simplified notion about the production and usage of ceramic ware, as well as the negligence for the functional and technological aspects, resulted in the absence of a clear statement if these techniques are in fact a form of decoration or surface treatment. On the other hand, paradoxically, these "elusive" phenomena have been taken as very precise chronological markers. The conclusions are not questionable even today, since the recent research has proven the chronological primacy of impresso over barbotine. Here, however, the shortcomings of the culture- historical method are most obvious: after the establishment of the relative chronological sequence and the identification of a change in the material culture, the reasons that induced the changes are not considered – interpretation is completely absent. However, the current archaeological trends focus upon the processes leading to changes in the material culture, the ones that cannot be explained without considering technology – from forming techniques to modes of usage. Bearing in mind that impresso, and afterwards barbotine appear on the same functional classes of pottery (storage, transportation), it may seem that the same idea motivated both manners of surface treatment – roughening so as to facilitate handling. In order to explain the reasons for the changes it is necessary to consider the forming techniques, with the most reliable indication in the chronological sequence impresso – relief impresso (plastic wheat-grain motif) – barbotine. The production of pottery with uneven surfaces rendered by impressing an instrument (impresso) and applying plastic bands, additionally fastened by impressing sharp instruments (relief impresso), is a time-consuming technique, requiring a lot of attention. It is therefore no wonder that the technique takes over of applying a layer of clay over a semi-dry surface and then arranging it with fingers – barbotine, since it is simpler and requires less work for the same effect. Current archaeological analyses of technology prove that the process of improvement of pottery forming techniques (leading to craft specialization) above all leads to simplification of procedure, in order to increase the number of vessels produced. Thus the typical assumption of traditional archaeology needs to be questioned, that the "development of culture" may be seen through the "evolution" of shapes and modes of decoration (treatment of surface), inevitably leading from simpler to more complex forms.

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