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Posted By David Fry
Sep 25, 2014
Since the first materials testing machines were used for tensile testing of metals, one option of performing the test has been to control the rate at which you apply load to the specimen, or apply stress.
Posted By David Fry
Jun 10, 2014
During a recent customer visit, a concern was raised about a turnaround point on the graph that they had not previously seen. Following a bit of investigation, the customer was producing galvanized steel of various grades, some of which was aged. The graph below shows a magnified view of the fairly aggressive upper yield point (UYS or ReH), which results in an almost immediate drop in stress.
Posted By David Fry
Jan 31, 2014
While there are many varieties of gripping technologies (wedge, screw, hydraulic, pneumatic, etc.), they all can be classified as proportional or non-proportional according to the way in which the clamping force is exerted on the specimen.
Posted By David Fry
Dec 30, 2013
Brief introduction into some of the changes and updates to both the ISO 6892-1 and ASTM E8/8M tensile testing standards for metals and ambient temperature.
Posted By David Fry
Sep 25, 2013
Following a recent lab visit, I thought it was worth writing a quick post to share an example of how labs sometimes incorrectly calculate yield strength. While visiting a testing lab for unrelated issues, my colleagues and I were discussing how the customer runs both continuous and discontinuous material with the same method (Non-YPE and YPE). For historical reasons, they have updated their Series IX methods to Bluehill 3 with little knowledge of why, when or by whom the methods were setup.
Posted By David Fry
Aug 15, 2013
Working alongside our friends at AZOM, they developed a series of engaging interviews with a few of our global colleagues. In the recent series, I was able to discuss metals testing requirements with a focus on the latest European metals standard, ISO 6892 and high precision strain measurement with the AutoX750.
