YHWH or Elohim? Why the switch?

Although we cannot be sure of the reason for the narrator’s switch from YHWH to hā’elōhîm in 22:1, 3, and 9, my hunch is that we are thereby put on notice that the issue at stake is whether Abraham’s God is just a generic deity, like the gods of the nations (hā’elōhîm), or the one known as YHWH, whose distinctive character Abraham needs to come to understand.” Indeed, while it is hā’elōhîmwho commands the sacrifice of Isaac, this sacrifice is stopped by a messenger or angel of YHWH (22:11), who speaks in YHWH’s name; and the name YHWH becomes connected to the place of Isaac’s rescue (22:14)—in both a place name (“YHWH sees/provides”) and a saying (“On the mount of YHWH it shall be seen/provided”). Perhaps this switch from hā’elōhîmto YHWH in the narrative is a signal to the reader that the instruction to sacrifice Abraham’s son could not be something that the deity known as YHWH really wants (or expects) Abraham to do. —Abraham's Silence, 128