Questions tagged [alloys]

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martensitic transformation, starting and finishing temperature

Searching about microstructure of Cu-Ni-Zn alloys I came across an article (published 2017) which in Conclusion says: Blockquote It was observed that the starting and finishing transformation ...
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Heat treatment processes in Nickel-Based Superalloys?

What is the difference in heat treatment process between Wrought Ni-Based superalloys &cast Ni-Based superalloys
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0answers
15 views

Difference in the properties arising from precipitates and intermettallics

What are the key differences in the mechanical properties caused by precipitates and intermettallics in metal alloys? So far I've found that intermettallics are larger phases, and are usually hard and ...
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3answers
47 views

Is thermal conductivity a property that affects the use of an alloy in high-temperature applications?

I'm interested in the effect of thermal conductivity on the choice of materials used for high temperature applications such as turbines. For the particular case of Nickel-Chromium alloys (such as René ...
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1answer
22 views

Where to find a list of hard low melting point alloys?

Im looking for alloys that have a melting point lower than 600°C and as high as possible hardness. Is there a search engine I could use to find those alloys with their physical properties?
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2answers
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What alloy am I making (Al-Bi)

I have been melting aluminum in a DIY furnace for a few months in order to make lost wax casts. I was thinking that since bismuth has a much lower melting point than aluminum, that I could add a small ...
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1answer
109 views

Purpose of a GD-Zn alloy

Here are screenshots of the data-sheets of two separate products for a reference. They both are nickel plated, used for coupling nuts. The former is shielded, the latter is not, I wonder if this is ...
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0answers
14 views

Electric Current Based Shape-Memory Alloy

Would it be possible to create a piece of metal, made out of an alloy or combination of alloys, that undergoes a shape-memory-esque change in structure in reaction to an electric current? Could it ...
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1answer
103 views

Tapping small hole on titanium

So I want to tap a super small hole on grade 5 titanium alloy with M1.8x0.2 (which should be possible according to this Quora's answer. But is there any tap available for me to do this job? I mean M1....
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2answers
2k views

What's the difference between tempering and aging?

The processes sound really similar; I'm asking with respect to Martensite processing. Essentially the difference between Tempered martensite and Aged martensite for Steels
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4answers
9k views

Benefits and disadvantages of aluminium alloys as a replacement for structural steels in ships

My Answer. Benefits: The major advantage of aluminum in ship building is its strength to density ratio. Aluminum has high tensile strength with less weight, which results in lowering the weight of ...
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2answers
125 views

38CrNiMoAlA: Does it even exist?

I have some plungers made of 38CrNiMoAlA. Their required hardness to be achieved via quenching/tempering is 51 HRC. I've scoured our technical order for heat treatment of steel alloys but the material ...
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1answer
131 views

Maximum Carbon content on the surface of Mild Steel that is Pack Carburized

Starting from a piece of Mild Steel that is then Pack Carburized, what's the maximum Carbon content that the surface can soak in? Given that we keep it around less than 1000°C and enough time, is it ...
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3answers
1k views

Steel : is Damascus steel still relevant compared to modern alloys?

Damascus steel is a multilayered hand-forged steel used in the past for arabic and japanese weapons and now for kitchen knives and various connoisseur blades. Usually, two alloys are used ...
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36 views

How to estimate the physical parameters of 40% Cu + 60% Mo alloy?

I need to know, or estimate the physical characteristics of the alloy which consists 40% copper and 60% molybdenum. I know only: Density: $9.62 \frac{g}{cm^3}$ Thermal conductivity: $223 \frac{W}{m·K}...
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2answers
109 views

Aluminum for an Ejection Seat Replica

I love ejection seats and the flying contraptions they usually reside in. In fact, I like them so much that I want to make my own, despite my profound lack of training and inexperience with ...
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2answers
278 views

Furnace for aluminum alloy creation

What kind of furnace is used to create alloys for aluminum die casting? I have only been able to find information about how to create alloys or how to process them afterwards in the die casting ...
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1answer
3k views

Alloys with same density as gold

Lavoisier's principle of mass conservation states that the mass of a system must remain constant over time. But, as far as I know, there's no similar principle for density. So, is it possible to ...
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1k views

ANSYS APDL Shape memory effect option of SMA not working

I am trying to define the material properties of a shape memory alloy material in ANSYS APDL V15. There are material properties for Superelastic materials (SUPE option) and material properties for ...
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4answers
2k views

How can the alloying materials of recycled steels be separated?

As I know, a very considerable part of the currently processed steels (around half of it) is coming from recycling. But during the steels coming into the recycling process are coming normally from ...
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4answers
3k views

Do "non-iron steels" exist?

There are numerous steel alloys, containing mostly iron, carbon, and some other metals. Generally speaking, we can think of them as if they were some type of steel. My question is: do "non-ferrous ...