scholarly journals PEMBENTUKAN MATERIAL (METAL FORMING) HOT WORKING PROCESS DAN COLD WORKING PROCESS

2019 ◽  
Author(s):  
Wahyu Hidayat
Keyword(s):  
Metal Forming ◽  
Cold Working ◽  
Hot Working ◽  
Working Process

1.Hot Working Process (Pengerjaan Dalam Kondisi Panas)Pada proses pengerjaan Hot Working Process ini akan terjadi kenaikan tegangan luluh, kenaikan nilai kekerasan material (logam baja), dan penurunan nilai keuletan material.2.Cold Working Process (Pengerjaan Dalam Kondisi Dingin) Proses pembentukan logam secara plastis dengan temperatur pengerjaan di bawah temperatur rekristalisasi.

scholarly journals Finite element simulation of sink pass round tubes using Ansys

2012 ◽  
pp. 179-188 ◽  
Author(s):  
M.P. Nagarkar ◽  
R.N. Zaware ◽  
S.G. Ghalme
Keyword(s):  
Modeling And Simulation ◽  
Product Quality ◽  
Metal Forming ◽  
Cold Working ◽  
Ansys Software ◽  
Simulation Techniques ◽  
Element Simulation ◽  
Simulation Results ◽  
Von Mises ◽  
Von Mises Stresses

Modeling and simulation of metal forming processes are increasingly in demand from the industry as the resulting models are found to be valuable tools considering the optimization of the existing and development of new processes. By the application of modeling and simulation techniques, it is possible to reduce the number of time-consuming experiments such as prototyping. Seamless tubes of various sizes and shapes are manufactured by various processes like sinking, fixed plug, floating plug, moving mandrel, cold working and hot working. The present work deals with the simulation of round tubes while passing through the sink pass, using ANSYS software. The simulation results are the displacement and von Mises stresses. The procedure can be used to improve the product quality and to study the effect of various parameters like die angle on the product quality.

scholarly journals Effect of cold-working process on cyclic deformation of electrolytic copper

2019 ◽  
Vol 72 (3) ◽  
pp. 485-491
Author(s):  
Gustavo Aristides Santana Martinez ◽  
Carlos Antônio Reis Pereira Baptista
Keyword(s):  
Cyclic Deformation ◽  
Cold Working ◽  
Working Process ◽  
Electrolytic Copper

An assessment of the Sachs method for measuring residual stresses in cold worked fastener holes

1998 ◽  
Vol 33 (4) ◽  
pp. 263-274 ◽  
Author(s):  
D J Smith ◽  
C G C Poussard ◽  
M J Pavier
Keyword(s):  
Finite Element ◽  
Residual Stresses ◽  
Cold Working ◽  
Element Model ◽  
Fe Model ◽  
Working Process ◽  
Element Analysis ◽  
Near Surface ◽  
Cold Worked ◽  
Good Agreement

Measurements of residual stresses in 6 mm thick aluminium alloy 2024 plates containing 4 per cent cold worked fastener are made using the Sachs method. The measurements are made on discs extracted from the plates. The measured tangential residual stress distribution adjacent to the hole edge are found to be affected by the disc diameter. The measured residual stresses are also in good agreement with averaged through-thickness predictions of residual stresses from an axisymmetric finite element (FE) model of the cold working process. A finite element analysis is also conducted to simulate disc extraction and then the Sachs method. The measured FE residual stresses from the Sachs simulation are found to be in good agreement with the averaged through-thickness predicted residual stresses. The Sachs simulation was not able to reproduce the detailed near-surface residual stresses found from the finite element model of the cold working process.

Analysis of the Cold-Working Process on Holes Containing Preexisting Cracks

2005 ◽  
Vol 42 (5) ◽  
pp. 1281-1287 ◽  
Author(s):  
Jidong Kang ◽  
W. Steven Johnson
Keyword(s):  
Cold Working ◽  
Working Process

Cellular Automaton Simulation and Experimental Observation of the Dynamic Recrystallization of Titanium Alloy TC11 with Varied Strain Rates

2012 ◽  
Vol 476-478 ◽  
pp. 71-74
Author(s):  
Zhi Fu Yang ◽  
Qing Yuan Meng ◽  
Yu Hang Jing
Keyword(s):  
Titanium Alloy ◽  
Dislocation Density ◽  
Dynamic Recrystallization ◽  
Strain Rate ◽  
Cellular Automaton ◽  
Experimental Observation ◽  
Hot Working ◽  
Strain Rates ◽  
Working Process ◽  
Loading Sequence

During the metal hot working process, the dislocation density will vary with strain and strain rate, and the variation of the dislocation density will affect the grain evolution subsequently. The cellular automaton (CA) method is an effective technique used to simulate the grain evolution of materials. In this work, a dynamic recrystallization (DRX) model of titanium alloy TC11 under varied strain rates was established by the use of cellular automaton method and verified by experimental observation. Two types of loading processes called “begin fast and then slowly” and “begin slowly and then fast” were simulated to investigate the titanium alloy TC11 grain evolution processes during hot working. The simulation results are in good coincidence with experimental data. Both cellular automaton simulation and experimental results show that the flow stresses and DRX transformation percentage during hot working process of the TC11 alloy are closely related not only to the strain rate but also to the loading sequence. Compared to the “begin slowly and then fast” loading sequence, the flow stress with the “begin fast and then slowly” loading sequence is relatively smaller under the same strain rates, and the DRX transformation percentage is relatively larger.

Extruded Products

Extrusion ◽  
2006 ◽  
pp. 9-58
Author(s):  
Günther Sauer
Keyword(s):  
Titanium Alloy ◽  
Deformation Temperature ◽  
Copper Alloy ◽  
Iron Alloys ◽  
Hot Working ◽  
Working Process ◽  
Temperature Range ◽  
Working Temperature ◽  
Extruded Products ◽  
Composition Properties

Abstract The hot-working process extrusion is used to produce semifinished products in the form of bar, strip, and solid sections, as well as tubes and hollow sections. The first part of this chapter describes the composition, properties, and applications of tin and lead extruded products with a deformation temperature range of 0 to 300 deg C and magnesium and aluminum extruded products with a working temperature range of 300 to 600 deg C. The second part focuses on copper alloy extruded products, extruded titanium alloy products, and extruded products in iron alloys with a working temperature range of 600 to 1300 deg C.

Recrystallization behavior of Ti40 burn-resistant titanium alloy during hot working process

2016 ◽  
Vol 23 (5) ◽  
pp. 581-587 ◽  
Author(s):  
Yun-jin Lai ◽  
She-wei Xin ◽  
Ping-xiang Zhang ◽  
Yong-qing Zhao ◽  
Fan-jiao Ma ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Hot Working ◽  
Recrystallization Behavior ◽  
Working Process

Failure analysis of bainitic steel pipe – Failed during cold working process

2010 ◽  
Vol 31 (5) ◽  
pp. 2625-2630 ◽  
Author(s):  
A. Nusair Khan ◽  
W. Muhammad ◽  
I. Salam
Keyword(s):  
Failure Analysis ◽  
Cold Working ◽  
Steel Pipe ◽  
Bainitic Steel ◽  
Working Process
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