Sunil Sinhmar

11 Questions 11 Answers 0 Followers

Questions related from Sunil Sinhmar

What is wettability in welding? How it affects friction stir weld joint's performance?

Hi there, Actually, I want to know that what is the need to check the wettability of a FSW joint? Kindly elaborate the term 'wettability' in case of a FSW joint. Thanks in advance.

01 July 2022 5,967 0 View

How to calculate power consumption for a friction stir weld joint?

Hi folks I want to know the best way to calculate or find the power consumed to produce a friction stor weld joint. Thanks in advance

20 May 2022 7,440 2 View

What is the reason to exhibit different colors (for example blue at outer and white at inner of cone) in the flame of gas welding?

Hi there Why the flame of gas welding exhibit different colors at different conditions? I want to know the reason to exhibit the colors, for example: generally in case of the neutral flame, the...

18 May 2021 1,513 2 View

How to define corrosion potential in simple and easily understandable way?

Hi, 1) Can we define corrosion potential as the potential at which the process of corrosion starts? 2) How to easily describe this term and distinguish from open circuit voltage so that one from...

27 September 2020 4,393 4 View

Most of the time in literature, 1 mV/s scan rate is used instead of standard scan rate (0.166 mV/s) for the potentiodynamic polarization test. Why?

Mostly, 1 mV/s scan rate is used for the potentiodynamic polarization test of the Aluminium alloys in literature. However, according to ASTM, the standard scan rate is 0.1667 mV/s. Does 1 mV/s...

08 May 2020 9,975 3 View

Can someone elaborate the difference between chemical and electrochemical corrosion in detail with examples ?

I want to know the basic difference between chemical corrosion and electrochemcial corrosion of the metals. Can chemical corrosion happens without electron transformation and presence of...

25 March 2019 6,191 7 View

Can Microhardness decrease with increase in ultimate tensile strength for welded AA2014 aluminium alloy?

Friction stir welding was performed at four different welding parameters (rpm: 508, 708, 931, 1216 at traverse speed 41 mm/min). But at some parameters (931-41) microhardness was less whereas the...

12 December 2017 4,589 6 View

How can heat inputs (in kJ/mm) of two different welding processes having different welding speed be compared ?

I am comparing heat input during FSW and TIG welding of Al alloy. Welding speed was 41 mm/min in case of FSW and 150 mm/min in TIG. Heat input in J/s (watt) is more in case of TIG as compared to...

27 September 2017 3,723 5 View

What is the correct unit to represent impedance (ohm.cm2 or ohm/cm2) in electrochemical impedance spectroscopy (EIS) data ?

Some people are using ohm.cm2 and others are using ohm/cm2 as the unit of impedance in their publications for EIS analysis. What is right one to use ? thanks in advance

25 April 2017 649 7 View

Is the position of HAZ in FSW joint at upper surface and cross section will be different ?

For upper surface it may be next to the shoulder edge, but at cross section it would be next to the pin edge.

19 June 2016 497 6 View

How can we identify that a particular intermetallic or precipitate is anodic or cathodic ?

For example - Mg32(Al,Zn)49 is a precipitate in aluminium alloy 7075

08 February 2016 5,549 3 View