Low temperature work hardening of Cu-based α-phase solid solutions

AbstractBoth ammonium chloride and ammonium bromide undergo a transition, with rise in temperature, from an interpenetrating simple cubic (II) to a face-centered cubic (I) lattice at 183 and 137°C, respectively, and both the low- and high-temperature forms give a complete series of solid solutions. We have determined the lattice constants of the high-temperature solids at about 250° as a function of composition, and redetermined the lattice constants of the low-temperature solids at room temperature. The solutions were made by crystallization from water, followed by stirring in contact with mother liquor for at least three weeks at room temperature. Measurements were made with a Norelco- Philips diffractometer and recorder, with Cu Ko. radiation. For the high-temperature work, a simple, inexpensive heating apparatus was developed. The only previous data reported for the high-temperature forms are the lattice constants of the pure components given by Bartlett and Langmuir.The low-temperature solutions showed negative deviations from Vegard's rule at both ends of the concentration range and a slight positive deviation elsewhere when high-angle data were used. The high-temperature solutions showed marked positive deviations from Vegard's rule over the whole compositions range. Values for the pure components agreed reasonably well with those of Bartlett and Langmuir.The progress of the change II → I with time was followed for some of the solutions in the neighborhood of the transition temperature in an attempt to reveal the mechanism of the process.

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Low-temperature work-hardening of cadmium single crystals

Acta Metallurgica ◽

10.1016/0001-6160(77)90136-5 ◽

1977 ◽

Vol 25 (9) ◽

pp. 1071-1075 ◽

Cited By ~ 15

Author(s):

B. Welke ◽

W. Tikvic ◽

A. Svobodová ◽

P. Lukác̆

Keyword(s):

Low Temperature ◽

Single Crystals ◽

Work Hardening ◽

Temperature Work

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The structural state and its association with low temperature work hardening of structural titanium alloys

Cryogenics ◽

10.1016/0011-2275(83)90019-x ◽

1983 ◽

Vol 23 (4) ◽

pp. 203-206 ◽

Cited By ~ 1

Author(s):

B.I. Verkin ◽

F.F. Lavrentev ◽

Yu.A. Pokhil ◽

P.P. Dudko

Keyword(s):

Low Temperature ◽

Titanium Alloys ◽

Work Hardening ◽

Structural State ◽

Temperature Work

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CERROCAST Alloy

Alloy Digest ◽

10.31399/asm.ad.sn0009 ◽

1980 ◽

Vol 29 (3) ◽

Keyword(s):

Low Temperature ◽

Physical Properties ◽

Tensile Properties ◽

Eutectic Alloy ◽

Heat Treating ◽

Melting Range ◽

Spray Painting ◽

Metal Products ◽

Temperature Work

Abstract CERROCAST Alloy is a non-eutectic alloy with a melting range from 281 F to 338 F. It provides manufacturing engineers with an easily castable material that is ready for use soon after it freezes; moreover, it can be recovered readily and recycled into new uses any number of times. Cerrocast alloy is used widely for spray molding techniques, for sealing and soldering in low-temperature work, for proof casting in foundries and for masks in spray painting and electroplating. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on heat treating, machining, and joining. Filing Code: Sn-9. Producer or source: Cerro Metal Products.

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Ce Doping Boosts the Thermo‐ and Photocatalytic Oxidation of CO at Low Temperature in TiZrO 4 Solid Solutions

Advanced Materials Interfaces ◽

10.1002/admi.202100532 ◽

2021 ◽

pp. 2100532

Author(s):

Panjuan Tang ◽

Stefano Livraghi ◽

Elio Giamello ◽

Sebastiano Garroni ◽

Luca Malfatti ◽

...

Keyword(s):

Low Temperature ◽

Solid Solutions ◽

Photocatalytic Oxidation ◽

Oxidation Of Co

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Effects of Double-Ageing Heat Treatments on the Microstructure and Mechanical Behaviour of a Ti-3.5Al-5Mo-4V Alloy

Materials ◽

10.3390/ma14010209 ◽

2021 ◽

Vol 14 (1) ◽

pp. 209

Author(s):

Xuanming Ji ◽

Panpan Ge ◽

Song Xiang ◽

Yuanbiao Tan

Keyword(s):

Electron Microscopy ◽

High Temperature ◽

Low Temperature ◽

Mechanical Behaviour ◽

Ageing Time ◽

Two Stage ◽

Ageing Treatment ◽

Ω Phase ◽

Α Phase ◽

Temperature Ageing

In this work, the effect of double-ageing heat treatments on the microstructural evolution and mechanical behaviour of a metastable β-titanium Ti-3.5Al-5Mo-4V alloy is investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The double-ageing treatments are composed of low-temperature pre-ageing and high-temperature ageing, where the low-temperature pre-ageing is conducted at 300 °C or 350 °C for different times, and the high-temperature ageing is conducted at 500 °C for 8 h. The results show that the phase transformation sequence is altered with the time spent during the first ageing stage, the isothermal ω phase is precipitated in the pre-ageing process of the alloy at 300 °C and 350 °C with the change in the ageing time, and the ω phase is finally transformed into the α phase with the extension of pre-ageing time. The existence time of the ω phase is shortened as the pre-ageing temperature increases. The microhardness of the alloy increases with increasing pre-ageing time and temperature. Compared with single-stage ageing, the ω phase formed in the pre-ageing stage changes the response to subsequent high-temperature ageing. After the two-stage ageing treatment, the precipitation size of the α phase is obviously refined after the double-ageing treatment. A microhardness test shows that the microhardness of the two-stage aged alloy increases with extended pre-ageing time.

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