Tensile deformation behavior of cold-rolled TRIP-aided steels over large range of strain rates

2007 ◽  
Vol 465 (1-2) ◽  
pp. 260-266 ◽  
Author(s):  
Xicheng Wei ◽  
Renyu Fu ◽  
Lin Li
Keyword(s):  
Deformation Behavior ◽  
Large Range ◽  
Tensile Deformation ◽  
Strain Rates ◽  
Tensile Deformation Behavior ◽  
Cold Rolled

The effect of strain rates on tensile deformation of ultrafine-grained copper

2017 ◽  
Vol 31 (16-19) ◽  
pp. 1744014
Author(s):  
M. Li ◽  
Q. W. Jiang
Keyword(s):  
Strain Rate ◽  
Deformation Behavior ◽  
Room Temperature ◽  
Tensile Deformation ◽  
Strain Rates ◽  
Roll Bonding ◽  
Fracture Elongation ◽  
Tensile Deformation Behavior ◽  
Ultrafine Grained ◽  
Flow Stress Level

Tensile deformation behavior of ultrafine-grained (UFG) copper processed by accumulative roll-bonding (ARB) was studied under different strain rates at room temperature. It was found that the UFG copper under the strain rate of 10[Formula: see text] s[Formula: see text] led to a higher strength (higher flow stress level), flow stability (higher stress hardening rate) and fracture elongation. In the fracture surface of the sample appeared a large number of cleavage steps under the strain rate of 10[Formula: see text] s[Formula: see text], indicating a typical brittle fracture mode. When the strain rate is 10[Formula: see text] or 10[Formula: see text] s[Formula: see text], a great amount of dimples with few cleavage steps were observed, showing a transition from brittle to plastic deformation with increasing strain rate.

Constitutive Modeling for Tensile Behaviors of Ultra-high-strength-steel BR1500HS at Different Temperatures and Strain Rates

2015 ◽  
Vol 34 (5) ◽  
Author(s):  
Guo-Zheng Quan ◽  
Dong-sen Wu ◽  
An Mao ◽  
Yan-dong Zhang ◽  
Yu-feng Xia ◽  
...  
Keyword(s):  
Constitutive Modeling ◽  
High Strength Steel ◽  
Deformation Behavior ◽  
Tensile Deformation ◽  
High Strength ◽  
Strain Rate Range ◽  
Strain Rates ◽  
Tensile Deformation Behavior ◽  
Ultra High Strength Steel ◽  
Different Temperatures

AbstractIn order to investigate the tensile deformation behavior of ultra-high-strength-steel BR1500HS, a series of isothermal tensile experiments were carried out in a temperature range of 1023˜1123 K and a strain rate range of 0.01˜10 s

A Study on Tensile Deformation Behavior in Fe-Based Shape Memory Alloy by Rate Sensitive Transformation Kinetics Model

2016 ◽  
Vol 725 ◽  
pp. 77-81
Author(s):  
Anthony Budiaman ◽  
Kazuki Fujita ◽  
Takeshi Iwamoto
Keyword(s):  
Numerical Simulation ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Deformation Behavior ◽  
Tensile Deformation ◽  
Rate Sensitivity ◽  
Kinetics Model ◽  
Strain Rates ◽  
Transformation Kinetics ◽  
Tensile Deformation Behavior

Fe-based shape memory alloy (Fe-SMA) shows a shape memory effect (SME) governed by forward and reverse stress-induced martensitic transformation (SIMT). Fe-SMA has been applied to joints and dampers utilized at various strain rates. To utilize Fe-SMA better, it is necessary to understand the mechanical properties in a wide range of strain rate. In previous study, the results of a tensile test at various strain rates show a rate-sensitivity, however, the mechanism of rate-sensitive tensile deformation behavior is still unclear. Thus, a numerical simulation using a transformation kinetics model is needed to clarify the mechanism. Some transformation kinetics models have been proposed, however, the rate sensitivity cannot be included. In this study, the rate sensitivity of volume fraction martensite is considered into the transformation kinetics model as an improvement of the past-proposed model. The numerical simulation of the uniaxial tensile test at various strain rates is performed to reproduce transformation behavior of the martensite phase. Then, the model is validated by comparing to the experimental results. Afterwards, the mechanism of rate-sensitive tensile deformation behavior of Fe-SMA is discussed.

scholarly journals Study on Microstructure and In Situ Tensile Deformation Behavior of Fe-25Mn-xAl-8Ni-C Alloy Prepared by Vacuum Arc Melting

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 814
Author(s):  
Yaping Bai ◽  
Meng Li ◽  
Chao Cheng ◽  
Jianping Li ◽  
Yongchun Guo ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Deformation Behavior ◽  
Tensile Deformation ◽  
Austenite Phase ◽  
Vacuum Arc ◽  
Al Content ◽  
Arc Melting ◽  
Vacuum Arc Melting ◽  
Tensile Deformation Behavior

In this study, Fe-25Mn-xAl-8Ni-C alloys (x = 10 wt.%, 11 wt.%, 12 wt.%, 13 wt.%) were prepared by a vacuum arc melting method, and the microstructure of this series of alloys and the in situ tensile deformation behavior were studied. The results showed that Fe-25Mn-xAl-8Ni-C alloys mainly contained austenite phase with a small amount of NiAl compound. With the content of Al increasing, the amount of austenite decreased while the amount of NiAl compound increased. When the Al content increased to 12 wt.%, the interface between austenite and NiAl compound and austenitic internal started to precipitate k-carbide phase. In situ tensile results also showed that as the content of Al increased, the alloy elongation decreased gradually, and the tensile strength first increased and then decreased. When the Al content was up to 11 wt.%, the elongation and tensile strength were 2.6% and 702.5 MPa, respectively; the results of in situ tensile dynamic observations show that during the process of stretching, austenite deformed first, and crack initiation mainly occurred at the interface between austenite and NiAl compound, and propagated along the interface, resulting in fracture of the alloy.

scholarly journals Comparison in Deformation Behavior, Microstructure, and Failure Mechanism of Nickel Base Alloy 625 under Two Strain Rates

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2652
Author(s):  
Meng Liu ◽  
Quanyi Wang ◽  
Yifan Cai ◽  
Dong Lu ◽  
Tianjian Wang ◽  
...  
Keyword(s):  
Strain Rate ◽  
Deformation Behavior ◽  
Tensile Deformation ◽  
Base Alloy ◽  
Inconel 625 ◽  
Tensile Fracture ◽  
Nickel Base Superalloy ◽  
Strain Rates ◽  
Tensile Fracture Surface ◽  
Nickel Base

Tensile deformation behavior and microstructure of nickel-base superalloy Inconel 625 are investigated under different strain rates of 5 × 10−4 s−1 and 5 × 10−5 s−1. According to the experimental results, yield strength and ultimate tensile strength of the alloy increase with the increase in strain rate in room temperature. Microstructure results indicate that the size of dimples is smaller in the tensile fracture surface at low strain rate than the high strain rate, and the number of dimples is also related to the strain rates and twins appear earlier in the specimens with higher strain rates. Apart from Hollomon and Ludwik functions, a new formula considering the variation trend of strength in different deformation stages is deduced and introduced, which fit closer to the tensile curves of the 625 alloy used in the present work at both strain rates. Furthermore, the Schmid factors of tensile samples under two strain rates are calculated and discussed. In the end, typical work hardening behavior resulting from the dislocations slip behavior under different strain rates is observed, and a shearing phenomenon of slip lines cross through the δ precipitates due to the movement of dislocations is also be note.

Compressive and tensile deformation behavior of consolidated Fe

2008 ◽  
Vol 493 (1-2) ◽  
pp. 226-231 ◽  
Author(s):  
S. Cheng ◽  
W.W. Milligan ◽  
X.-L. Wang ◽  
H. Choo ◽  
P.K. Liaw
Keyword(s):  
Deformation Behavior ◽  
Tensile Deformation ◽  
Tensile Deformation Behavior
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