scholarly journals Numerical Model for Mechanical Nonlinearities of High Manganese Steel Based on the Elastoplastic Damage Model

Metals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 680
Author(s):  
Seul-Kee Kim ◽  
Jong-Hwan Kim ◽  
Jeong-Hyeon Kim ◽  
Jae-Myung Lee
Keyword(s):  
Stainless Steel ◽  
Aluminum Alloy ◽  
Natural Gas ◽  
Damage Model ◽  
Tensile Behavior ◽  
Manganese Steel ◽  
Cryogenic Temperatures ◽  
High Manganese ◽  
High Manganese Steel ◽  
Elastoplastic Damage

For constructing marine liquefied natural gas (LNG) fuel/storage tanks, high manganese steel is being recognized as an alternative to stainless steel, nickel alloy, and aluminum alloy. In this study, the nonlinear tensile behavior of high manganese steel was investigated and numerically simulated at cryogenic temperatures at which natural gas exists as a liquid. Physical experimental tensile tests were carried out for a flat test specimen at 293 K and 110 K. In particular, the tensile behavior of a flat hole-notched high manganese steel specimen was experimentally obtained. A specimen with a hole was readily fractured compared to one without a hole. Tensile behavior of high manganese steel at the two cryogenic temperatures was compared to that of stainless steel, nickel, and aluminum alloy. In addition, numerical tests were performed for flat tensile specimens under identical experimental conditions. The elastoplastic damage model was derived and implemented using an Abaqus user-defined subroutine to appropriately simulate material behavior and degradation. The influence of some parameters on tensile behavior was investigated. The simulation results satisfactorily replicated the nonlinear tensile behavior of high manganese steel. The proposed numerical method, which is based on the damage-coupled material constitutive model, can be applied to structural analysis on the finite element analysis platform considering mechanical nonlinearities induced by severe conditions such as cryogenic temperature.

Non-linear tensile behavior of high manganese steel based on elasto-plastic damage model

2017 ◽  
Vol 41 (3) ◽  
pp. 222-229
Author(s):  
Jong-Hwan Kim ◽  
Jeong-Ho Lee ◽  
Seul-Kee Kim ◽  
Min-Sung Chun ◽  
Jae-Myung Lee
Keyword(s):  
Damage Model ◽  
Tensile Behavior ◽  
Manganese Steel ◽  
High Manganese ◽  
High Manganese Steel ◽  
Plastic Damage ◽  
Non Linear

A Comparison of Fracture Toughness and Fatigue Crack Propagation Characteristics of High Manganese and Nickel Steels

2018 ◽  
Author(s):  
Jeong-Yeol Park ◽  
Myung-Hyun Kim
Keyword(s):  
Fracture Toughness ◽  
Fatigue Crack ◽  
Low Temperature ◽  
Natural Gas ◽  
Structural Integrity ◽  
Liquefied Natural Gas ◽  
Manganese Steel ◽  
Nickel Steel ◽  
High Manganese ◽  
High Manganese Steel

Recently, demands for liquefied natural gas (LNG) are increased by developing countries such as China, India and Middle East area. In addition, the International Maritime Organization (IMO) reinforced regulations to avoid the serious environmental pollution. This trend has led to manufacturing and operating various LNG vessels such as liquefied natural gas carrier (LNGC), floating liquefied natural gas (FLNG) and very large gas carrier (VLGC). In the design of LNG vessels, the structural integrity of LNG storage tank is of significant importance to satisfy the service conditions. In order to secure structural integrity, LNG storage tank is fabricated with low temperature materials. In general, low temperature materials such as SUS304L, Invar alloy, Al 5083-O, nickel alloy steel and high manganese steel exhibit excellent fatigue and fracture performances at cryogenic temperature. In particular, high manganese steel has attracted interest because they are potentially less expensive than the competing other low temperature materials. This study compares the fracture toughness and fatigue crack growth characteristics of high manganese steel with those of nickel steels. In addition, fracture toughness and fatigue crack growth rate tests for various nickel steels are conducted according to BS 7448 and ASTM E647, respectively. In order to obtain less conservative design values, the results of high manganese steel and various nickel steels were compared to those of BS7910. As a result, the CTOD value of high manganese steel is higher than that of 9% nickel steel at cryogenic temperature. In case of FCGR, the high manganese steel and 9% nickel steel are found to be similar to each other.

Unusual relationship between impact toughness and grain size in a high-manganese steel

2021 ◽  
Vol 89 ◽  
pp. 122-132
Author(s):  
Pan Xie ◽  
Shucheng Shen ◽  
Cuilan Wu ◽  
Jiehua Li ◽  
Jianghua Chen
Keyword(s):  
Grain Size ◽  
Impact Toughness ◽  
Manganese Steel ◽  
High Manganese ◽  
High Manganese Steel

scholarly journals Development of Elastoplastic-Damage Model of AlFeSi Phase for Aluminum Alloy 6061

Metals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 954
Author(s):  
Hailong Wang ◽  
Wenping Deng ◽  
Tao Zhang ◽  
Jianhua Yao ◽  
Sujuan Wang
Keyword(s):  
Aluminum Alloy ◽  
Constitutive Model ◽  
Material Properties ◽  
Damage Model ◽  
Scratch Test ◽  
Aluminum Alloy 6061 ◽  
Ultra Precision ◽  
Simulation Results ◽  
Alloy 6061 ◽  
Elastoplastic Damage

Material properties affect the surface finishing in ultra-precision diamond cutting (UPDC), especially for aluminum alloy 6061 (Al6061) in which the cutting-induced temperature rise generates different types of precipitates on the machined surface. The precipitates generation not only changes the material properties but also induces imperfections on the generated surface, therefore increasing surface roughness for Al6061 in UPDC. To investigate precipitate effect so as to make a more precise control for the surface quality of the diamond turned Al6061, it is necessary to confirm the compositions and material properties of the precipitates. Previous studies have indicated that the major precipitate that induces scratch marks on the diamond turned Al6061 is an AlFeSi phase with the composition of Al86.1Fe8.3Si5.6. Therefore, in this paper, to study the material properties of the AlFeSi phase and its influences on ultra-precision machining of Al6061, an elastoplastic-damage model is proposed to build an elastoplastic constitutive model and a damage failure constitutive model of Al86.1Fe8.3Si5.6. By integrating finite element (FE) simulation and JMatPro, an efficient method is proposed to confirm the physical and thermophysical properties, temperature-phase transition characteristics, as well as the stress–strain curves of Al86.1Fe8.3Si5.6. Based on the developed elastoplastic-damage parameters of Al86.1Fe8.3Si5.6, FE simulations of the scratch test for Al86.1Fe8.3Si5.6 are conducted to verify the developed elastoplastic-damage model. Al86.1Fe8.3Si5.6 is prepared and scratch test experiments are carried out to compare with the simulation results, which indicated that, the simulation results agree well with those from scratch tests and the deviation of the scratch force in X-axis direction is less than 6.5%.

Low-temperature tensile and impact properties of hydrogen-charged high-manganese steel

2019 ◽  
Vol 44 (13) ◽  
pp. 7000-7013 ◽  
Author(s):  
Young-Hyun Nam ◽  
Jong-Seo Park ◽  
Un-Bong Baek ◽  
Jin-Yoo Suh ◽  
Seung-Hoon Nahm
Keyword(s):  
Low Temperature ◽  
Manganese Steel ◽  
High Manganese ◽  
High Manganese Steel ◽  
Impact Properties

scholarly journals Bubble Flotation for Purification of High Manganese Steel with Porous Blower

2019 ◽  
Vol 37 ◽  
pp. 375-379
Author(s):  
Ke Zhu ◽  
Zhengbing Xu ◽  
Siyong Zhao ◽  
Jianmin Zeng
Keyword(s):  
Manganese Steel ◽  
High Manganese ◽  
High Manganese Steel

Experimental Study of Improved Tool in High Manganese Steel Drilling

2010 ◽  
Vol 97-101 ◽  
pp. 1863-1866
Author(s):  
Liang Yang ◽  
Li Xu
Keyword(s):  
Experimental Study ◽  
Simulation Method ◽  
Manganese Steel ◽  
Drill Bit ◽  
Test Results ◽  
Comparison Analysis ◽  
High Manganese ◽  
Drilling Force ◽  
High Manganese Steel ◽  
Drill Tool

Performance of tool has always been a puzzle in the course of high manganese steel drilling. In this paper, improvement of drill tool is been done on drill bit structure and parameters of cutting tip by means of analyzing geometric parameter. By utilizing simulation method correctly, the influence of bit parameter on drilling force is analyzed. Meanwhile, by adopting the way of dividing into groups, comparison experiment between improved and no improved has been done. The comparison analysis of test results is carried out including tool life, wear and drilling force. The conclusion showed that the improved bit has better performance.

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