The effects of Co and Al in steels?

Why does the Co make the CCT curve move leftwards? Why do the Al and Co raise the Ms point? Thank you.

03 April 2016 788 0 View

The forming conditions of epsilon and alpha martensite?

Does anyone know the forming conditions of epsilon and alpha martensite? Thank you.

03 April 2016 7,037 3 View

Does anyone know the forming mechanism of the annealing twins in austenitic steels after annealing treatment?

Does anyone know the forming mechanism of the annealing twins in austenitic steels after annealing treatment?

03 April 2016 7,681 1 View

Does anyone know the method of changing the as-welded columnar austenite microstructure into equiaxed austenite microstructure?

Does anyone know the method of changing the as-welded columnar austenite microstructure into equiaxed austenite microstructure in the weld metal of the austenitic steel? Thank you.

02 March 2016 3,995 4 View

Does anyone know the differences of the resistance spot weldability of the galvanized and galvanneal steel sheets?

Does anyone know the differences of the resistance spot weldability of the galvanized and galvanneal steel sheets? The electric resistances of the Zn layer on galvanized steel sheet and the Zn-Fe...

02 March 2016 6,888 1 View

How to confirm the deformation mechanism of spot welds with different Mn contents?

31 December 2015 1,599 3 View

Does anyone know the effect of Mn on the stacking fault energy of austenite in steel, and how to measure the stacking fault energy of austenite?

Does anyone know the effect of Mn on the stacking fault energy of austenite in steel, and how to measure the stacking fault energy of austenite? Thank you.

31 December 2015 7,008 2 View

Does anyone know the effect of Mn content on the transformation of austenite to martensite in high Mn steel during deformation process?

Does anyone know the effect of Mn content on the transformation of austenite to martensite in high Mn steel during deformation process? For the high Mn steel with full austenite microstructure,...

09 October 2015 889 5 View

Can anyone tell me the differences among the three nugget diameters along the three interfaces in the four-layer resistance spot welds?

For the four-layer resistance spot welds, there are three interfaces in the spot welds, namely two side interfaces and one center interface. The nugget diameters along the two side interfaces are...

02 March 2015 191 1 View

What will happen if the steels were quenched for more than one time?

For high strength steels, fully austenite microstructure can be obtained when the steels were quenched from the temperatures above the austenitizing temperature. If we conduct the quenching...

31 December 2014 6,967 19 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

12% ledeburitic cold work tool steel, etched for revealing retained austenite, any help for clarifying?

Hello everyone. Given microstructure image belongs to a 12% ledeburitic cold work tool steel (annealed and tempered). The sample was etched with picral (100 mL ethanol and 4 g picric acid). I...

02 March 2021 4,119 3 View

Why Austenite grains in steel show much more twinning than ferrite grains?

It is oftentimes said to be a distinctive metallographic trait that differentiates a fully austenitic and a fully felly ferritic steel without etching that might distinguish between two. Why...

02 March 2021 728 2 View

For Carbon-emission free steelmaking by electrolysis with nonoxidizable electrode in EAF, what would be electrode material?

While CCS can be employed along with a conventional Carbon-efficient EAF steelmaking process (especially from iron ore) or even Hydrogen or hydrocarbon can bee passed through central electrode,...

30 January 2021 3,378 1 View

What are the thermodynamic and kinetic similarities and differences among dendrite formation during solidification of metals, ceramics and polymers?

Basic dendrite formation of metallic alloys are explained by thermal and constitutional degree of supercooling and most-supercooled band of liquid somewhat ahead of solidification front that...

30 January 2021 8,450 2 View

How much Ti and B (in ppm) is required for effective grain refinement and why?

To have the desired grain size in 6061 and 6063 Al alloy, what should be the minimum % of Ti and B pick up and what is the chemistry/metallurgy behind that?

07 January 2021 9,305 2 View

Which analysis method in XRD analysis is the most accurate way to measure crystallite size & lattice starin? Scherrer, Williamson-Hall or Rietveld?

Here are three different ways to calculate crystallite size and lattice strain of a sample, based on XRD peaks: "Scherrer" calculation, "Williamson-Hall" or "Rietveld". Each calculation is proper...

04 January 2021 7,836 4 View

How are nickel based super alloyed turbine discs produced with powder metallurgy?

I am researching this subject for my Powder Metallurgy class. I couldn't find a solid information on production steps.

29 December 2020 5,503 3 View

Hello everyone, which software is preferable for simulating the effect of shrinkage of metal powders for the Additive manufacturing process?

Last time I was asked about simulation software to analyze the effect of shrinkages of plastic powder materials. Currently, an additive manufacturing process is what I find suitable for my...

29 December 2020 4,615 9 View

SDAS, secondary dendritic arms space relation with solidification rate?

Want to know the relation between sdas and solidification rate, the mechanism by which getting smaller space between secondary arms by increasing the rate ?

23 December 2020 735 2 View