Comments on: Russia: Air leaks fixed on Zvezda https://behindtheblack.com/behind-the-black/points-of-information/russia-air-leaks-fixed-on-zvezda/ Mon, 15 Mar 2021 16:53:31 +0000 hourly 1 https://wordpress.org/?v=6.9.4 By: pzatchok https://behindtheblack.com/behind-the-black/points-of-information/russia-air-leaks-fixed-on-zvezda/#comment-1116992 Mon, 15 Mar 2021 16:53:31 +0000 https://behindtheblack.com/?p=73949#comment-1116992 I no longer think these are stress fractures.

Stress fractures would be far larger than 4 centimeters and would be in a patern reflecting the stress passing through the metal.

More than likely these are small inclusions or dirt particles inside the metal that got spread out into long lines during the rolling proccess.

Obviously any visible flaws in the metal would disqualify it for use but did the Soviets have a way to X-ray inspect the whole of the sheat and did they do a thorough job if they did?
I do not trust their quality control.

]]> By: Jay https://behindtheblack.com/behind-the-black/points-of-information/russia-air-leaks-fixed-on-zvezda/#comment-1116903 Mon, 15 Mar 2021 01:06:19 +0000 https://behindtheblack.com/?p=73949#comment-1116903 Jeff,
It was up about six years. I still have the package of the seeds that was flown on the LDEF I was given when I was a student. I never planted them and I framed it in my office at home.

]]> By: Jeff Wright https://behindtheblack.com/behind-the-black/points-of-information/russia-air-leaks-fixed-on-zvezda/#comment-1116803 Sun, 14 Mar 2021 09:04:13 +0000 https://behindtheblack.com/?p=73949#comment-1116803 LDEF wasn’t up there as lon, or was it?

]]> By: Lee Stevenson https://behindtheblack.com/behind-the-black/points-of-information/russia-air-leaks-fixed-on-zvezda/#comment-1116708 Sat, 13 Mar 2021 15:28:01 +0000 https://behindtheblack.com/?p=73949#comment-1116708 @pzatchok, all metals suffer from fatigue if subject to punishment of one sort or another. I doubt that any components were sent into orbit without relevent testing, ( especially back when the module was manufactured…), More likely is that we do not fully understand how metals react to stress in zero g over long time scales… I can imagine crystallisation due to stress occuring much faster in zero g’s, but I’m no metallurgist… If nothing else, we should learn something from this, but as Bob says, only if the problem is admitted and investigated.

]]> By: pzatchok https://behindtheblack.com/behind-the-black/points-of-information/russia-air-leaks-fixed-on-zvezda/#comment-1116621 Sat, 13 Mar 2021 00:38:03 +0000 https://behindtheblack.com/?p=73949#comment-1116621 I am starting to think that the skin of the module was manufactured with flaws inside the aluminum.

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