Solid Solution Hardening of Intermetallic Compounds

1992 ◽  
Vol 288 ◽  
Author(s):  
Robert L. Fleischer
Keyword(s):  
Solid Solution ◽  
Intermetallic Compounds ◽  
Solid Solution Hardening ◽  
Solution Hardening

Temperature Dependence of Yield Stress and Dislocation Dissociation in L12-Ordered Intermetallic Compounds

2011 ◽  
Vol 1295 ◽  
Author(s):  
Haruyuki Inui ◽  
Norihiko L. Okamoto
Keyword(s):  
Solid Solution ◽  
Temperature Dependence ◽  
Yield Stress ◽  
Intermetallic Compounds ◽  
Low Temperatures ◽  
Solid Solution Hardening ◽  
Solution Hardening ◽  
Partial Dislocations ◽  
Ordered Intermetallic ◽  
Dislocation Dissociation

ABSTRACTThe temperature dependence of yield stress and the associated dislocation dissociation in L12 intermetallic compounds are investigated in order to check the feasibility of the classification of L12 intermetallic compounds so far reported in terms of the planarity of core structures of partial dislocations with b = 1/2<110> and 1/3<112> on {111} and {001} glide planes. In contrast to what is believed from the reported classification, the motion of APB-coupled dislocations is proved to give rise to the rapid decrease in yield stress at low temperatures for Co3Ti and Co3 (Al,W). The temperature dependence of yield stress at low temperatures is newly interpreted in terms of a thermal component of solid-solution hardening, at least, for these two L12 compounds. We have proposed a new way to describe the yield stress–temperature curves of L12 compounds with three parameters (the athermal and thermal components of solid-solution hardening and the anomalous strengthening component) when the dislocation dissociation scheme is of the APB-type.

A Tem Study of Slip Systems in MoSi2/WSi2 Alloys

1991 ◽  
Vol 49 ◽  
pp. 942-943
Author(s):  
Stuart A. Maloy
Keyword(s):  
Solid Solution ◽  
Solid Solution Hardening ◽  
Slip Systems ◽  
High Melting ◽  
Group 14 ◽  
Solution Hardening ◽  
Brittle To Ductile Transition ◽  
High Melting Temperature ◽  
Tetragonal Unit Cell ◽  
Structural Applications

MoSi2 has recently been investigated as a potential material for high temperature structural applications. It has excellent oxidation resistance up to 1700°C, a high melting temperature, 2030°C, and a brittle-to-ductile transition temperature at 900-1000°C. WSi2 is isomorphous with MoSi2 and has a body-centered tetragonal unit cell of the space group 14/mmm. The lattice parameters are a=3.20 Å and c=7.84 Å for MoSi2 and a=3.21 Å and c=7.88 Å for WSi2. Therefore, WSi2 was added to MoSi2 to improve its strength via solid solution hardening. The purpose of this study was to investigate the slip systems in polycrystalline MoSi2/WSi2 alloys.

Solid solution hardening and softening in MoSi2 alloys

2001 ◽  
Vol 44 (6) ◽  
pp. 879-884 ◽  
Author(s):  
A.A Sharif ◽  
A Misra ◽  
J.J Petrovic ◽  
T.E Mitchell
Keyword(s):  
Solid Solution ◽  
Solid Solution Hardening ◽  
Solution Hardening ◽  
Hardening And Softening

Solid-solution hardening in b c c metals

1980 ◽  
Vol 15 (1) ◽  
pp. 253-254 ◽  
Author(s):  
M. Z. Butt ◽  
P. Feltham
Keyword(s):  
Solid Solution ◽  
Solid Solution Hardening ◽  
Solution Hardening

scholarly journals Solid Solubility and Solid Solution Hardening of Boron in NiAl

1993 ◽  
Vol 57 (3) ◽  
pp. 356-361 ◽  
Author(s):  
Yi Tan ◽  
Tetsumori Shinoda ◽  
Yoshinao Mishima ◽  
Tomoo Suzuki
Keyword(s):  
Solid Solution ◽  
Solid Solubility ◽  
Solid Solution Hardening ◽  
Solution Hardening

Solid-Solution Hardening

1990 ◽  
pp. 135-140
Author(s):  
P. Feltham ◽  
N. Kauser
Keyword(s):  
Solid Solution ◽  
Solid Solution Hardening ◽  
Solution Hardening

Martensitic Transformation of High-Entropy and Medium-Entropy Shape Memory Alloys

2021 ◽  
Vol 1016 ◽  
pp. 1802-1810
Author(s):  
Hiromichi Matsuda ◽  
Masayuki Shimojo ◽  
Hideyuki Murakami ◽  
Yoko Yamabe-Mitarai
Keyword(s):  
Solid Solution ◽  
High Temperature ◽  
Martensitic Transformation ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Transformation Temperature ◽  
Solid Solution Hardening ◽  
Solution Hardening ◽  
High Entropy ◽  
The One

As new generation of high-temperature shape memory alloys, high-entropy alloys (HEAs) have been attracted for strong solid-solution hardened alloys due to their severe lattice distortion and sluggish diffusion. TiPd is the one potential high-temperature shape memory alloys because of its high martensitic transformation temperature above 500 °C. As constituent elements, Zr expected solid-solution hardening, Pt expected increase of transformation temperature, Au expected keeping transformation temperature, and Co expected not to form harmful phase. By changing the alloy composition slightly, two HEAs and two medium entropy alloys (MEAs) were prepared. Only two MEAs, Ti45Zr5Pd25Pt20Au5, and Ti45Zr5Pd25Pt20Co5 had the martensitic transformation. The perfect recovery was obtained in Ti45Zr5Pd25Pt20Co5 during the repeated thermal cyclic test, training, under 200 MPa. On the other hand, the small irrecoverable strain was remained in Ti45Zr5Pd25Pt20Au5 during the training under 150 MPa because of the small solid-solution hardening effect. It indicates that Ti45Zr5Pd25Pt20Co5 is the one possible HT-SMA working between 342 and 450 °C.

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