Effect of Thermal Cycling on Creep Behavior of Powder-Metallurgy-Processed and Hot-Rolled Al and Al-SiC Particulate Composites

Fe-14Mn-6Si-9Cr-5Ni (wt. %) shape memory alloys (SMAs) were produced by powder metallurgy (PM) combined with Mechanical Alloying (MA). The specimens were pressed and sintered under Ar atmosphere from as blended powders as well as from mixtures of as blended and 10, 20, 30 and 40 vol. % MA’ed powders, respectively. The five groups of sintered specimens were hot-rolled, spark-erosion cut and solution treated at five temperatures (923, 1023, …, 1373K/ 300 s/ water). Tensile loading-unloading tests were performed in order to obtain stress-induced martensite at different pre-straining degrees. The static responses of the twenty five types of specimens were evaluated by means of the surface areas under unloading curve (E2) and between loading and unloading curves (E1) which were used for determining static internal friction, Q-1. The dynamic responses of the undeformed specimens were determined by Dynamic Mechanical Analysis (DMA) performed at room temperature with a three-point-bending specimen holder in strain sweep mode. The structure of the twenty five specimens was analyzed X-ray diffraction. The effects of MA fraction were correlated with static and dynamic responses via structural changes.

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High Temperature Creep Behavior and Effects of Stacking Fault Energy in Mg-Y and Mg-Y-Zn Dilute Solid Solution Alloys

Materials Science Forum ◽

10.4028/www.scientific.net/msf.783-786.491 ◽

2014 ◽

Vol 783-786 ◽

pp. 491-496

Author(s):

Mayumi Suzuki ◽

Yasuyuki Murata ◽

Kyosuke Yoshimi

Keyword(s):

Activation Energy ◽

Solid Solution ◽

Creep Behavior ◽

Ternary Alloys ◽

Dislocation Creep ◽

Prismatic Slip ◽

Dislocation Slip ◽

Self Diffusion ◽

Controlling Mechanism ◽

Hot Rolled

Compressive creep behavior of hot-rolled (40%) Mg-Y binary and Mg-Y-Zn ternary dilute solid solution alloys are investigated in this study. Creep strength is substantially improved by the addition of zinc. Activation Energy for creep in Mg-Y and Mg-Y-Zn alloys are around 200 kJ/mol at the temperature range from 480 to 570 K. These values are higher than the activation energy for self-diffusion coefficient in magnesium (135 kJ/mol). Many stacking faults, which are planar type defects are observed on the basal planes of the magnesium matrix in Mg-Y-Zn ternary alloys. TEM observation has been revealed that the non-basal a-dislocation slip is significantly activated by these alloys. The rate controlling mechanism of Mg-Y and Mg-Y-Zn dilute alloys are considered to the cross-slip or prismatic-slip controlled dislocation creep with high activation energy for creep, more than 1.5 times higher than the activation energy for creep controlled dislocation climb.

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Thermal cycling creep behavior of NiAl–Cr alloy

Intermetallics ◽

10.1016/s0966-9795(01)00003-6 ◽

2001 ◽

Vol 9 (4) ◽

pp. 279-286 ◽

Cited By ~ 4

Author(s):

R.S. Sundar ◽

K. Kitazono ◽

E. Sato ◽

K. Kuribayashi

Keyword(s):

Thermal Cycling ◽

Creep Behavior

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High temperature creep behavior of a cast polycrystalline nickel-based superalloy K465 under thermal cycling conditions

Materialia ◽

10.1016/j.mtla.2020.100913 ◽

2020 ◽

Vol 14 ◽

pp. 100913 ◽

Cited By ~ 1

Author(s):

Xiaotong Guo ◽

Weiwei Zheng ◽

Wenrui An ◽

Stoichko Antonov ◽

Longfei Li ◽

...

Keyword(s):

High Temperature ◽

Thermal Cycling ◽

Creep Behavior ◽

High Temperature Creep ◽

Polycrystalline Nickel ◽

Temperature Creep ◽

Nickel Based Superalloy

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Creep Behavior of Powder Metallurgy SiC-Al Composites

Advanced Engineering Materials ◽

10.1002/1527-2648(20020916)4:9<651::aid-adem651>3.0.co;2-d ◽

2002 ◽

Vol 4 (9) ◽

pp. 651-657 ◽

Cited By ~ 2

Author(s):

F.A. Mohamed

Keyword(s):

Powder Metallurgy ◽

Creep Behavior

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Characterization and Properties of Iron/Silica-Sand-Nanoparticle Composites

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.316-317.97 ◽

2011 ◽

Vol 316-317 ◽

pp. 97-106 ◽

Cited By ~ 6

Author(s):

Tahir Ahmad ◽

Othman Mamat

Keyword(s):

Mechanical Properties ◽

Electrical Conductivity ◽

Powder Metallurgy ◽

Metal Matrix ◽

Silica Sand ◽

Particulate Composites ◽

Powder Metallurgy Technique ◽

Superior Mechanical Properties ◽

Iron Based ◽

Nanoparticle Composites

Metal matrix-particulate composites fabricated by using powder metallurgy possess a higher dislocation density, a small sub-grain size and limited segregation of particles, which, when combined, result in superior mechanical properties. The present study aims to develop iron based silica sand nanoparticles composites with improved mechanical properties. An iron based silica sand nanoparticles composite with 5, 10, 15 and 20 wt.% of nanoparticles silica sand were developed through powder metallurgy technique. It was observed that by addition of silica sand nanoparticles with 20 wt.% increased the hardness up to 95HRB and tensile strength up to 690MPa. Sintered densities and electrical conductivity of the composites were improved with an optimum value of 15 wt.% silica sand nanoparticles. Proposed mechanism is due to diffusion of silica sand nanoparticles into porous sites of the composites.

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Characterization of the Microstructure, Tensile and Creep Behavior of Powder Metallurgy Processed and Rolled Ti-6Al-4V-1B Alloy

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.436.195 ◽

2010 ◽

Vol 436 ◽

pp. 195-203 ◽

Cited By ~ 3

Author(s):

Wei Chen ◽

Carl J. Boehlert

Keyword(s):

Elevated Temperature ◽

Powder Metallurgy ◽

Creep Behavior ◽

Creep Deformation ◽

Deformation Behavior ◽

Creep Resistance ◽

Tensile Creep ◽

Duplex Microstructure ◽

Α Phase

This work investigated the microstructure and elevated-temperature (400-475oC) tensile and tensile-creep deformation behavior of a powder metallurgy (PM) rolled Ti-6Al-4V-1B(wt.%) alloy. The PM rolled Ti-6Al-4V-1B alloy exhibited a duplex microstructure, and it did not exhibit a strong α-phase texture compared with the PM extruded Ti-6Al-4V-1B alloy. The PM rolled Ti-6Al-4V-1B alloy exhibited greater creep resistance than the PM extruded Ti-6Al-4V-1B alloy as well as the as-cast Ti-6Al-4V-1B alloy.

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