Dirk Lehmhus

9 Questions 55 Answers 0 Followers

Questions related from Dirk Lehmhus

Artificial/natural ageing response of ANSI/SAE 385 and similar Aluminum Casting Alloys ?

Hello everybody, I am looking for information about precipitation hardening/ageing of die casting alloys identical with or related to ANSI/SAE 385.0 - according to specification, this alloys...

01 December 2020 2,021 3 View

Can anyone suggest publications on local temperature/time temperature profile in Selective Laser Melting of Al and steel?

We have made some initial experiments on Additive Manufacturing of composite materials using an EOS SLM machine and, to start with, standard EOS AlSi10Mg materials. To interpret the...

07 January 2016 3,144 6 View

What is the coefficient of thermal expansion (CTE) and mechanical properties as a function of temperature for Fe99.7, Invar, 316L?

Dear all, for a simulation-based study on metal matrix syntactic foams, we need data on mechanical performance (best stress-strain curves) and coefficient of thermal expansion as a function of...

15 January 2015 3,355 7 View

How can I determine the mechanical properties of hollow microsphere shells?

We are using glass microspheres, cenospheres and the like to produce iron and steel matrix syntactic foams (see my publications for details, and attachment below as example) - the raw materials we...

29 April 2014 8,655 15 View

Sensor networks for structural health monitoring: Information at once for changing system states?

I would like to start a discussion here on the best ways of realizing fast to immediate data evaluation in sensor networks with complex monitoring tasks. A further complication is that the state...

28 November 2013 7,194 1 View

When do we need material-integrated sensing? When does external application of sensors suffice?

In a research environment, we are taking a lot of efforts to address the challenges associated with true material-integration of intelligent sensing systems. The envisaged application scenarios...

01 October 2013 7,233 6 View

System-Integrated Intelligence - can we profit from discussions crossing borders of disciplines and applications ?

We (well, in this case that is ISIS/University of Bremen as well as colleagues from the Universities of Paderborn and Hannover) believe that engineering systems will be endowed with increasing...

28 August 2013 2,086 3 View

Dynamic collapse in metal foam, yes or no ? I don't have a chance to follow it up myself - anybody out there want to do some verification, by experiment or simulation ?

Basically the paper discusses the possibility of a dynamic collapse mechanism in metal foams produced via a blowing agent route. The example is aluminum foams. The arguments supporting it are...

20 June 2013 6,893 0 View

Environmental impact of metal additive manufacturing of aluminum alloys compared to casting

I would like to gather opinions as well as factual information about a comparison between metal additive manufacturing and casting processes - maybe, based on my own work, with a focus on high...

01 January 1970 2,826 2 View