Is there any realistic hydrogen induced cracking test for Automotive steels (Martensitic -AHSS)?

I feel like the current A/SP Delayed Cracking test is too aggressive than reality.

06 July 2018 7,266 0 View

What is the good characterization technique to measure Carbon segregation in Low carbon steel ?

Carbon is tricky to measure in SEM/EDS due to interaction volume, X-ray energy loss due to atomic weight difference and absorption as well as fluorescence effects. APT is good. Is there any other...

02 March 2018 9,947 9 View

How many packets, blocks and laths can be present in one prior austenite grain size of 25 microns for 0.3 carbon steel?

Lath Martensite: How many packets are in one prior austenite grain? How many blocks are in one Packet? How many laths are in one block (approximately)? what is the role of orientation relationship?

08 September 2017 7,336 4 View

What is the significance of quenching non-homogeneous austenite on mechanical properties in 0.2-0.4% carbon steels at high heating and cooling rate?

Physical behavior of Lath Martensite with heterogeneous local chemistry and microstructure resulting from non-homogeneous Austenite during very short holding time and rapid quenching.

04 May 2017 7,111 2 View

Is there any realistic hydrogen induced cracking test for Automotive steels (Martensitic -AHSS) at industry level ?

The current A/SP Delayed Cracking test (attached) is too aggressive (0.1 N, pH=1) than reality. Curious if there is any simple mechanical test can be used

01 January 1970 8,942 4 View

Will bimodal grain size distribution in DP steel improve the hole expansion ratio (HER) /stretch flangeability?

01 January 1970 1,268 2 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

How the parameters (such as Mw, Chemical bonds, polymer bland and so on) affect the mechanic property of polymer (such as storage, loss modulus) ?

Anyone can recommend any books on such topics? Thanks in advance.

02 March 2021 8,457 2 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

How Can I bring as much common elements in steel as possible to calculate stable phase(s) in OpenCalphad?

As I was tweaking step-by-step OpenCalphad6 Macros step1.ocm involving phase and thermal property calculation of a High-speed steel, I could not incorporate more than 6 elements in the steel...

01 March 2021 8,840 1 View

I need to accelerate corrosion in steel parts that are used in a salt-water environment. Is there a technique for doing so?

I have a structure that employs d-ring swiveling tie-downs that corrode during use and become "frozen". I have sample swivel assemblies that I wish to corrode to see if I can free them using one...

01 March 2021 3,739 3 View

Why is my platinum counter electrode getting dirty during electrodeposition?

I am conducting anodic electrodeposition of MnO2 onto a stainless steel substrate, using a platinum strip as a counter electrode. This is done galvanostatically, with the current held between 5...

27 February 2021 1,829 3 View

Modeling viscosity using model of Chung?

Hello, As part of simulation of gases mixture and water, I need to calculate viscosity of the fluid components and I am using relationships proposed by Chung et al. (1988). The irony is while I...

25 February 2021 8,053 5 View